Although ohlins is a better suspension, you also need special tools for it too i believe, whereas your current ones you can do maintenance with your normal set of tools if i am correct. I don't do my fork maintenance, i let a pro do it, i trade him coffee for it

, and he's got all the tools and stuff to do it right, it's got some gas cartridge in there and it's easier to let someone who does that kind of stuff for a living do it rather than risk screwing something up, and finding out you screwed up at 160 mph.
Aaron