I agree with Drrdiamond; I have compared an older KSA to the FPB300 (which I bought). I prefer the FPB. You also get a very sophisticated set of microprocessors that do surge protection, short-circut protection, and will shut the amp down if it overheats (it must have to be on fire for that to happen!). I also have a FPB250Mc for my center channel. I think from an ergonomic aspect, I would prefer a set of the monoblocks rather than the 110 lb. stereo amp. I haven't really compared sound between the two so I won't comment. As Drrdiamond said, if you aren't going to use the cast technology, you might as well save the money and buy the non-cast, older version. I would bet you could get a pair of 250Mc's for $6000 or pick up a FPB300 for $4000. The $2000 might be better used else where in your system but that's your call.
Good luck!
Gregg
Good luck!
Gregg