very simple.
e28 m5 (w/ the v12 swap option)
volvo 850r
ford escort (the one the seirra cosworth was based off of)
the datsun 510.
more sedans. hsv, fpv vehicles (sorry guys, austrailian vehicles are the way most american cars should be made... large turbo 6's are just as bulletproof as the lsx and 5.0's, modulars etc.. but yes there is nothing that can compare to a cam'd v8 idling)
not really much i would want to be added, but the upgrades section needs to be more realistic. in the game supra's can't hit over 1k hp, evo's make no where near the power they could, bmw's can't be turbo'd (HPF makes a great kit for m3's), even stuff for domestics is nerf'd.
I think the upgrades should be more balanced, and heck if turn 10 wants ill find the people with the cars so they can realistically record the data.
Zanatech Racing... tuning crappy cars... to make them slightly crappier.