Hi Ray,
You are correct. This is an audio nirvana! No, I haven't purchased a sub yet. I will probably go for a VP100 next. Then a set of QS8's. Slowly building the system etc. The bass from the M60's is pretty awesome as is! You can really turn these speakers up. Thankfully my room is very good acoustically. I'll get a sub eventually however I really want to get a new Denon A/V Receiver now that the Axioms are here! The urge to upgrade has struck!!!!!!