I've been following the forums closely since I purchased my SRT in Sept. 07. I am in your shoes right now. I'm looking at purchasing my initial perormance goodies soon. I have no real world experience in the performance category, but here's what I gather from the recent postings:

1. If you're looking for a mod that will make driving feel more spirited, buy the sprintbooster A2. The A1 for the regular crossfires is even more extreme.

2. For more performance gain, and an "in your face" supercharger sound, get the Needswings intake.