But while we're on the topic, let's talk high-security locks.

Basic Kwikset, Schlage, and the like are really the bottom of the barrel... usually ANSI grade 3, which is the lowest grade for residential locking hardware. It goes like this:

ANSI grade 3: basic, residential door hardware
ANSI grade 2: heavy residential and light commercial use
ANSI grade 1: commercial-grade and high-traffic use

There are tests that locks sets must endure before earing various grades... drill resistance, wrench-resistance, length of throw, and so forth.

Ideally you want grade 2 as a minimum for the security-minded home (or even grade 1, though that's usually for high-traffic and commercial buildings where locksets really get abused). Contractors often use Grade 3 Kwikset and so forth because they're cheap, and most people don't know the difference. Kwikset/Schlage/etc also have a big advantage in terms of product selection; they can be had in a wide variety of looks/finishes. If a person wants oil-rubbed bronze door hardware throughout the entire house, you're going to have trouble finding high-security Grade 1 hardware in that finish.

There are two big things to consider once you've got basic reliability and functionality out of the way: Resistance to physical attack, and pick resistance. Resistance to physical attack will frankly have more to do with the door and frame than the lock itself, as the former will usually give before the lockset breaks (particularly if the entry tactic is boot-to-door, and your frame sucks). Gang-bangers tend towards smash-and-grab, and are NOT going to sit there and drill out your lock cylinder with a carbide bit... it's just not their MO. A burglar might attack the lockset of an otherwise heavy-duty door... but we're talking home invasions.

In terms of pick resistance, there's a huge body of info out there on the net... places like this forum. Basic locks are easily picked/bumped, and bump keys can be bought on the internet all day long. Experienced burglars have known about this for decades, of course... but now the info is widely available to anti-social teens, and other delinquents-in-training. Open-source information is always a double-edged sword, but don't count on security-through-obscurity to back up your cheapo door locks.

Another concept to consider is key control. Do you ever loan a key out to anybody? Does your teen ever loan his keys to a buddy, or let somebody drive his car? Ever let a coworker borrow your car? Ever use a valet? Do you leave your keys in your desk drawer at work? Ever leave a key under the mat?

If all anybody has to do is borrow/impression your house key, run down to the hardware store and make a copy (or file one himself with an easily-purchased key blank), then you're looking at a potential security problem. If you're known as a gun owner with a lot of hardware, you're a target, and you never know which coworker's brother-in-law likes to make some extra money on the side...

So consider getting a lockset with a difficult-to-duplicate key. If they have to contact the manufacturer to get a copy (and can't just make one of their own with a file), you're probably better off. It goes without saying that you should keep extra keys in safe places in case you get locked out.

So who makes high-security door locks?

Assa Abloy is a european company that manufactures high-security locks, and owns a lot of other lock-making companies (including Medeco and Mul-T-Lock, off the top of my head). Their Pro-tec line is fairly highly regarded. Very difficult to pick or bump.

Medeco. They're expensive (a couple of hundred $ per door), but very solid, and they have a great reputation. Lots of high-security government buildings and other installations use Medeco locks. An additional plus is that you stand a decent chance of getting a key copied by an appropriately-certified locksmith. These are also very pick/bump resistant, though a successful attack was reportedly performed at the last DEFCON.

Mul-T-lock. I kind of like these... and they have a pretty sexy-looking dimpled key. Very pick and bump-resistant, though a new pick from China has recently hit the market that makes these a lot easier to attack. They also make a very nice removable-thumbturn deadbolt, enabling you to inter-convert a standard deadbolt into a double-key deadbolt (the thumb-turn can be taken off if you have the key). They also have a "Cliq" model that includes an encrypted code on a chip in the key... virtually impossible to forge or copy, but extremely pricey (IIRC, about $500 per door). Getting a duplicate key requires sending a special number and ID back to the manufacturer.

Bilock. These are from an Australian company that has distributors in the US. They're bump-proof, and extremely pick-resistant. You can forget about the hardware store being able to copy these keys... they're individually cut and bent on a special machine. As with Mul-T-Lock, we're talking about sending to the manufacturer for a new key. Among the high-security locksets, these are one of the most reasonably-priced.

There are a few options that are cheaper, and come from more conventional lock companies.

Kwikset has a new series of deadbolts that are higher security than the usual fare... the Smart Series. Some are Biometric, and some allow you to rekey the deadbolt yourself with an included tool... VERY convenient, and more cost-effective than some of the options listed above.

Schlage also has the new Primus series of deadbolts. They have key control, and are much more pick/bump resistant than the standard deadbolt.

Choose whatever option suits you best.

Quoted:
here's a link to consumer reports-hope it works:

http://www.consumerreports.org/cro/home-garden/home-improvement/home-security/door-locks/door-locks-1005/ratings/latest-ratings/index.htm

Quoted:
Medeco is the way to go, built like a Tank, easier to find then some of the other high end brands.  You can buy over the Internet and install yourself (read up and measure your door, backspace, etc).  When I move the locks go with me at the last minute, go to Home Depot or Lowes buy a 8 dollar POS deadbolt and change out your Medeco when you move, it makes the high cost an investment in security.