I would still go with M60s then a sub, the impact for movies is better, but going for the QS's is a very close call. You will have the money for the surrounds before you will be able to get the sub, so the QS's from an economical point of view is better, you will get to start enjoying movies in 4.0 much sooner, tough call.

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