XRT (the best ever), FZ50 and LX series.
XRT : Mainly because I played it since demo, and get used to it, and the handling is good compared to other car. Speedrift, Showdrift, i'm lovin' it
FZ50 : Monster. 350Hp transfered to the rear make this car my choice for long slide, overangle, and speedy drift.
LX4 & LX6 : This is one best ride! Lightweight, power all around. 1st tried it with a Race_s set, and now has a set and it is oversteer happy car. Scary.