Pipe recommendation for 99 300 MXC

I'm looking for some pipe recommendations for my 99 300 MXC. I do not race, but play pretty hard. The bike already has great low and mid RPM. Until last night I hadn't hit WOT. I did last night and found I was already riding it pretty much to its peak as WOT produce little to nothing in the upper RPM. I'm running stock gearing, new, 14/52. It currently has the original pipe with a PowerCoreII silencer. The OEM pipe is pretty dinged, for my taste. I plan on getting a Spark arestor for it eventually.

recommendation and reasons from folks with a 300 would be most beneficial. Fitment is important as well.

Thanks

Thank you, that is the kind of information I am looking for. I think I will get the Fatty.