That is a very nice system out the box. You may never need to upgrade. The difference between your prior experience and this system will be a shock (to you and the neighbors). And for that reason, unless price is no issue, I would put the sub on hold. It does add great things, but you are adding so much that you won't miss the sub in a small room. Down the road, once you get used to the system, or get a bigger room that sucks up bass, you can upgrade (small u, not big U). For now, you will appreciate your M60s that much more.
Enjoy.
Oh, and don't listen to that B.S. about speaker wire. It is 99% of the sound! Maybe a tad less, but well over 10%!
Panny 3000 PJ, 118" Carada, Denon 3300, PS3, Axiom QS8, PSB 5T, B&W sub, levitating speaker wire
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