Gran Turismo 5 Prologue: Best car for 100,000?

I am struggling to come first in the Class A Gran Turismo All Stars Competition. What car would you recommend is best for about 100,000?

Thanks

I got this game on Thursday and I already have a Nissan R35 GT-R and a Ferrari F430 :D I'd say get the Dodge Viper, or the Nissan R35.

Stop! Hammer time!

Save up a little longer. Get the Ford Gt for 150k~, it walks all over them. Then you can do The first All Stars Race over and over and get 20k creds easy peasy.