How fast do you want to go? (I'm talkin in the 1/4 mile)?
The NA Crossfire is a 14 sec. car with a 6 spd. 15 sec. with an automatic (stock). Spend lot's of money, and install NOS, and just barely break into the 13's.
Or you can buy an SRT for a few thousand more, (than a Limited) and run low 13's (high 12's) "stock". Spend a few 1000 dollars more on mods, and run in the low 12's high 11's.
It's really that simple.