the thing is, "bass poweramps" are perfectly suitable for pa applications, and "pa poweramps" are perfectly suitable for bass.
I am intrigued by some of the smaller mono poweramps coming out, but mostly for size weight reasons.
The ones I've used do sound different though. The "bass amp power amps" usually have a bump in the mids and have some stylization to the tone vs. a totally flat PA amp. I've had great results in the past with the Eden WT1000. Its a very stout, fat, slightly furry sounding amp and often yields a warmer final tone than a PA amp does. Really depends on the cab which one is going to work better.

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