Yokomos GT4s are good if they're hopped up. The RTR doesn't have a lot of the needed parts. When you add up all the needed parts, it gets expensive. Its an old design that they've updated by coming out with aftermarket parts that are included in the GT4w 2 limited edition. I have one, and know the extra parts needed. If you want to keep costs down, go with the TC3.
RC Car Action Editor and Photographer