We ride trails a bit and it loved mud when we had the mudder tires on it....All the reviews I read before buying it said that it was THE CHOICE for trail riding over all the other sport quads that year. Good mix of power and handling. They all liked the YFZ better of course for racing because it is about 50 lbs lighter. The Pred is just a fun all-around quad.
I wish I knew more about scramblers, but I have zero experience with them. I've looked at a couple and they are cool, but a bit old skool in styling. I'm sure they would be a kick in the pants tho. 4x4 sport quad with 400cc of 2-stroke power sounds like a natural to me. This Pred is the only Polaris 've ever owned, but check these guys out:
Polaris ATV Forum