The best route for value/performance has surely got to be rebuilt/revalved/resprung SP stuff, this would be my choice.
To spend a bit more you could get RS forks and an RS125 rear shock, both will still need a rebuild to your weight if they're to outperform modded to suit you SP stuff .
After that you can go as nuts as you like, Ohlins rear shocks may well be awesome, they're also a lot of money and USD forks from anything you fancy will fit with enough effort, whether they work better than good stock stuff is open to discussion. _________________ Please do not PM me technical questions, if you can't find it on the Forum start a thread