unfortunately the 20vt is a lot more refined in EVERY way than your rst! and im pretty sure youll have a few traction issues with big power r5gtts etc... but really you need to be talking to someone who can do this professionally,and write them a cheque,its a bit of a black art and fitting every suspension mod in the world is useless unless you know how to set it up right. id say that you would have to compromise if you want a good all rounder,but im sure all aspects can be made better than your current setup!