I put a clutch kit on my 03' RX and left my 05' stock. The 05 was just as quick and maybe quicker because of the mono-shocks weight transfer. In addition I didn't think my stock 03 clutching was that bad, I lightened the tip weight on my brothers stock 03 and it ran every bit as good as my 03 with the clutch kit. Also on the big end my brothers was faster than mine.

Ski's, Carbides, and Shocks are probably what I will fool around with.

As far as studs go they're great! That's why I don't run them anymore.....The confidence you have is awsome but there will be that time when you grab the brake and your confidence is gone and your eyes are two big golf balls in the helmet. I have not damaged me or any of my sleds since I stopped running with studs.