For whatever reason Aperion doesn't seem that popular around here. I mean that in the sense that not many people have them, not that they're not well liked. I have both the 532s and 632s in my system. "Smooth" is probably as good a description for them as any. They are, in my opinion, nicely balanced; they're not extreme in either the high or low end, unlike some of the others. I might've expected a little more power from the 532s, but that may just be because the 632s sounda lot bigger. Otherwise, you can't beat the finish, build quality, return policy, etc.
Cheers,
Kevin