Mike, is this mainly for home theater or music? About what % each way?
If more HT, I'd suggest a sub, and factoring that into your budget. Your current receiver is fine for that. Re which speakers, M60/VP150/QS8 (QS4 if there's any doubt about driving The QS8's 6 ohm loads). For a sub Axiom is fine but many like the Hsu STF-2.
If more for music it's somewhat more complicated. Surround speakers aren't much use unless you either have multi-channel surround music (SACD, DVD-A, or Digital Dolby or DTS 5.1), or a receiver with Dolby PLII or Logic 7 to reconstruct surround from stereo material. Of course the M60s in the above config are excellent stereo speakers, so would work fine for that, and the surrounds/center would be used for HT. I like multichannel music, but good stereo is really good, and would sound great on M60s.
