Rick, welcome. You should be very pleased with the results you'd get from a system including M80s and QS8s. You seem to be spending needless time(and money?)worrying over amplification, however. The M80s are fairly easy to drive and typical receivers anywhere in the 100-150 watt area are plenty for all safe listening levels.
As to the Bryston, it certainly isn't "pretty much accepted", at least by those knowledgeable in audio amplifier design technology, that they "can sound bright". Such a basic flaw in frequency response would indicate grossly incompetent engineering by Bryston, and this certainly isn't the case. Bryston units have flat response to well beyond audibility and there's no need to be worrying about how they do as a "match".
The M80s don't need "high end"(i.e., high priced) amplification, but if you choose to spend your money on such equipment any of those under serious consideration would be satisfactory.
