[Donut]

We bought the originial Vex Kit and the Programming Kit months ago, but stocked up on these items recently;
2 ultrasonic sensors
1 shaft encoder set
1 limit switch set
4 motors
2 servos
2 gear kits
2 chain and sprocket kits
1 metal kit
1 wheel kit
2 tank tread kits
1 omni-wheel kit

If you plan on using anything other than the smallest wheels for moving, buy another wheel kit, otherwise your big wheels are completely worthless. Get at least 1 tank tread kit as they can be used for conveyor belts as well as tank treads, we grabbed 2 just in case we needed alot of conveyor belting on a robot (the current small one we're building for this year's game is going to use 3 seperate belts). Metal is good to inevst in unless you'll be cutting your own material to build with, and the gear kit is essential if you plan on doing much more than driving.

All of the sensors are optional, it really depends on how much programming you plan on doing. We purposely only got a few things to test with, once we've gotten the ultrasonic and whatnot to work we will invest in better ones that can be used for the FRC robot and test them on the VEX kit.