Which car should I tune for big endurance races?

[Sprinter_AE86]

ok so im finishing up the begginers races....

i drive a silvia 1800 that is decent and im tuning a mira TR XX for the FF and lightweight races....my question is what car should i tune for big endurance races and such..

im looking for big motor potential, handling, and acceleration...good all around..

choices i have started with are

Supra RZ
RX-7
Skyline
3000GT AWD
EVO
STi

any others i should take a peek at? im looking at the market of about 20 to 40 thousand new.