The sub is THE most important part of the HT environment, at least to me. I still can't believe it took me ~5 years to get a good one. I bought mine as the last piece of the audio puzzle, as I already had a sub and didn't think gettting a better one would add that much, boy was I wrong.

Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70