I have a Rs42 with hop ups and I race newbie parking lot stuff at the local LHS I can tell you from personal experince that my little RS4 takes corners so much better than the guy with the 4tech there. He can fly by me in a straight but he ussually eats a board or better yet ends up on his lid in the 2 corner. I am waiting for the HPI R40 in september as my new car. I have heard tons of good things about the AE NTC3 though...I just hate Associated bad experince with a car once long story...it is between those two cars then get an RS4 unless all you do is drag race then the 4tech will be just grand at that