1st, the speakers are incredible. Love mine. I'm running them off of an Infinity 7541a amp. 278wRMS power x 2. I think you're gonna want more power than the kx350.4 (keeping in mind that the Pro80's are rated at 175watts RMS). These speakers suck up the juice, and with good reason - they're loud and constant with their power needs.
Wetsounds recommended to me that I get an amp that is rated for more power than the speakers are rated. This keeps my amp from over heating and kicking off (I have a separate sub issue which should be solved by a capacitor). This doesn't mean you don't have to be careful with how loud you crank them up - over power them too much, and they'll blow like any other speaker.
Anyway, I'm happy with the 280watts (that IS rms) I'm pumping into mine.
pics at: http://www.2froeses.com/sn2001
(scroll to the bottom of the page)