Those measurements indicate 310W peaks into 4 Ohms with less than 1%THD+N. I'd say you're good to go. smile

I hear what you're saying about M5s and no sub. They are indeed very satisfying on their own. But when you properly integrate a good sub or two, there's no going back!

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated