I think you will be impressed with the M3's.

I would never consider them (the M3's) cheap budget speakers.

They are fantastic speakers at a budget price. IMO. I would never give mine away, as I have with many other speakers I have owned.

Definitely do some A-B testing with the polks when you get them.

Be sure to post your views on the two.

I would be interested in the comparison.
M80's(2), VP150, QS8's(2), M3's(4)