Model 1 is good, and they offer chrome lining on almost all of their kits. It all depends on how picky you are; all the Model 1 barrels are HBARs, if this should bother you RRA would probably be a better source of uppers.
I did some math and I find it is practically just as cheap to buy an entire kit rather than just a Model 1 upper...for a CAR upper with charging handle and B/BC assembly it is $410, and for the entire kit it is $450, which basically means that you get both a buttstock with all the buttstock-related parts and a lower parts kit for
$40!! Even if you only use the upper you could probably sell the parts kit and buttstock for more than $40, which means you make a profit.
if you are not an HBAR person (don't sweat it, neither am I, that's why I'm building my own upper) then I would suggest going with RRA, as they offer chrome lining on some models and also have some lightweight options. You could also step up on the price a bit and go for a Bushmaster upper, they offer a whole lot of barrel profile and length options, and their barrels are really good as far as quality goes (4150 steel, ALL chrome lined). Also Bushmaster service is on top. It really comes down to what you need, what you want, and how much you are willing to spend to get the most of both.
I do a lot of posts like this...
HTH
-N3rday