I've traded in an S2000 for a 6 spd XFire, the S2k is definitely more of sports car then the Xfire but the
XFire is 10x for comfortable for everyday driving. If you can afford to have 2 cars then S2k and something else for day to day otherwise Crossfire.

S2k has the best trans I've ever experienced, SRT6 is auto only so S2k and SRT-6 is really a proper comparison.