My experience... I'm most likely going to go thru Ford Racing, I bought a kit from them for my 2006 GT that had the springs, dynamic dampers, anti-roll bars and a tower strut brace (which I won't need this time). They've offered this every year so far, and when I called them, they said they are testing on new GT. I paid $900 at the time, I think it's 1200 now for the 2010. My 2006 is simply fantastic, the only other complete kit I would be interested in is from Rousch. I don't know anyone who has it, so can't say much about it. I do know a couple of guys who just bought springs and there is simply no comparison. I had my kit put on by an authorized Ford (authorized by Ford Racing) dealer (only 3 in Ohio) and the camber was adjusted, put on the laser rack and comes with complete warranty. When you spend 30k + on a car, another 1200-1500 (somewhere in there with install) is nothing. Rumor has it, the new kit may come with a custom ECS tune. I've been offered 22k for my car (which I'm not selling), so I think it is huge for resale.
2006 GT, FRPP drag pack, FRPP handling pack
2011 GT ordered 1/30, off the truck on 6/21
Black GT - 401a, Black/Cashmere interior
6 spd, spoiler delete, security package
3.73, HID, comfort package
Brembo brake package, Glass top
First mod - CS front fascia