I think Epyon said it. M3 but if it were a Z06 then you already know. The crossfire is a great car and for the price you can't beat the style. The srt is a nice car too, but these are not in the league as the aforementioned cars. I love my car but there is no such thing as a true sports car with no clutch. If I had the cash the day I bought my car M3 is what I would drive. But as it turns out I get the same panties drop effect in the Xfire. They love it especially because the tints are so dark the start stripping in the car.

M3 0-naked 4.8 seconds
rs4 0-naked 6.5 seconds
xfire 0-naked 4.3 seconds