Just my opinion based on on 30 years of LE experience and having to sit through traffic court (I hated it...unless the violator punched me in the face or called my momma names, I didn't care if the prosecutor dismissed the tickets as long as it kept me from having to attend the circus that is traffic court).
What's the cost difference between paying the fine/court costs, hiring an attorney, or driving back to court to contest the ticket (not sure where in GA you live)? Not having any tickets on your record now and if you don't routinely get them, it's likely your insurance won't hike your rate and the points from this one won't have any affect on your license.
If you do decide to go to court, don't wear a suit...just wear some decent jeans/slacks with a polo shirt tucked in. If you show up to traffic court, especially in a small podunk town, in a suit you're going to appear that you have the time/money/determination to "fight this thing" (especially if you had to travel a considerable distance to get there). Just show up looking like a respectable, regular Joe that's got bills to pay, kids to feed, and a wife that likes to shop...not someone that's got the time/money to throw at a ticket they were guilty of (I'm assuming you were actually going 84/60 since you didn't mention anything about being unjustly written a ticket). Speak to the prosecutor beforehand...they'll likely work with you because the more stuff they can clear off their docket, the faster they get to go home. They don't want to go to trial (and "trial" in municpal traffic court is merely you and the prosecutor standing in front of the judge) any more than you do if they can help it...unless the office that wrote the ticket has some type of protest. How was your interaction with the officer?