I'm thinking of purchasing either M3, M22 or M40 speakers. How would these speakers mate with an old NAD 3020 integrated amp. As everyone probaby knows, the 3020 is rather warm and sweet, but a bit out of focus.

1. Any opinions on this mating?
2. Which speakers to buy, M3, M22, or M40? Size is not important.
3. (...and this is an embarassing question :-) How do the speakers mentioned above compare with an old pair of Polk Monitor 10s (excluding bass of course)?

Thanks for your help. It's much appreciated.