Forza 3 cool car you can upgrade to r2

A few I have upgraded include the Bugatti Veyron, 458 Italia, Gallardo Supperleggera, Murchielago LP 670-4 SV, Nissan GTR, Ferrari f40. All of these cars will go up to low to mid range R2s. There is also many other cars you can upgrade to R3 like the VW rabbit GTI, most Nissans, most Porsches, most Ferraris and a lot more.