i can also confirm that the Renthal ultra low fit fine without changing anything, you may want o file off the plastic locating lump on the switch gear, unless you are happy to drill brand new handlebars!
I have the Nitron NTR sport shock on my bike. cost about £400 ish. have had it for about 18 months now, it smooths the road out nice, with great damping, i ride fast road etc, and when i hit potholes etc (of course we try and avoid, but no always possible) i feel it from the front, but the back...