vetofunk,
The attached website is one of the best when looking for performance parts for your SRT-6. Unfortunately, prices are quite steep. Stick with the SRT-6 and don't be tempted by the Z, WRX, RX-8 or any other pretenders. The Crossfire has much better styling and comparable performance and is still relatively exclusive, especially in SRT-6 trim.
Kevin
http://www.mbworld.org/forums/index.php