Get ready for some fun man, heres some of my kills as of recently (all from a roll, dig is just too easy ):

Audi AS4R
New Cobra & GT (also v6 but not worth mentioning haha )
Audi A4
Mustang 5.0 foxbody
Acuras 3.2CLS
Merc CLK430
Merc CLK 500
Porche 911 turbo
and more...

The only thing that has taken me so far has been a new BMW M5. I didn't feel bad tho since it's V10, 500hp