More manufacturer tuner cars, like the Toyota TRD 2000GT MR2 and the 3000GT Supra, The Mazda RX7 Aspec, The NISMO GTR S-Tune and R-Tune, The Ralliart Eclipse. Update the car list to include new cars that came out, like the Mitsubishi Lancer GTS and Nissan Skyline GTR. Why is the Nissan Altima Coupe not there? No oldschool VW Beetle? The third gen Camaro isn't there. Caterham needs to be in this game. The Aston Martin DBR9 would be nice. If you don't want several makes of the same model, might I suggest having aerodynamic replacements from the manufacturer of different year models as long as the basic underlying body design hasn't changed. Like for example, if I wanted my Mitsubishi Eclipse to have a GT trim instead of the GS, or to be able to choose between an '06 trim and an '07 or to have a mock Tommi Makinen version of the Lancer Evolution VI. Racing Service Watanabe Rims would be much appreciated. Some old(albeit personal) favorites like the Mitsubishi Lancer(1979-1988) EX or 1800GSR/GT Turbo, and the Datsun Sports series. Where's Suzuki?
Anyway, these were just some things off the top of my head. I'm sure there's more as I try to recall all the models that I really liked growing up.