I've heard the MA b2, BR2, and PSB alpha.
voltain, I just want to note that for $9 more can get you PSB B15s. Its a marked improvement from the Alpha line.
I'm sure these guys are pointing you in the right direction, and Im sure they've heard a lot more of these speakers than I have.
PSB Images can crank. Midbass leaves something to be desired, IMO, with the bookshelves, but good speakers. I'd be curious on those KEFs too.