I'm exploring my next bike options. The YZ450 has always been on the short list for my next ride (the 300XC-WE is too but that's another story...). I'm riding a 2006 YZ250F right now, pretty much bone stock except for lower gearing, etc. I ride 100% trails, but its usually gnarly technical to wide open fast with big climbs where the 250f can be completely tapped out. Yea, I'd like some more power, enough that I don't need to have the bike opened out on big climbs or where I can be a lazy 4 stroke rider and not use the clutch so much. I love my bike otherwise. The '08 looks like a nice bike, albeit with that funky can. I love the idea of a quiet bike, but do you think I'll notice how plugged up it seems to be, coming from a 250f?