I reckon that if it's got to be cheap, ZX636 or 10R is definately the way to go... The fitment's relatively simple, and the spring rate should be not bad for you if memory serves. The damping's a wee bit of a fudge, you'll not get a perfect setting but it's still going to be miles better than standard so that's OK. And 1/10 the price of an Ohlins