I'll vouch for the M5OWs as front stereo speakers as well. I hooked them up as fronts just to shake things up while I'm building out my room and I'm always amazed at the sound they produce. I was running them off my AVR but a dedicated amp will give you the extra head room. The M5s are pretty hungry.

LFR1100
VP180HP
EP600
M3 In Ceiling x 4
M5OW
M2 - Atmos rears
ADA1500.5
M3 Outdoor Speakers
ADA 1000.8