I have a StagePas 300. I highly recommend it for keyboards. At least half the time, I am playing acoustic piano patches on my Motif. I still own a QSC K10, which I use when I need more power, but I prefer the StagePas. Advantage for keyboards is that it is stereo, easy to carry. I host a weekly open mic, so it is not uncommon to use all channels on the mixer. The gigs that I play are usually smaller rooms, where people want to enjoy the music, but hold conversations. It works really well for that.
Yamaha Motif XF6, Yamaha AN200, Alesis Micron, Sonar X3, Arturia Microbrute, Behringer Model D, Yamaha UX-3 Acoustic Piano, assorted homemade synth modules