How big is the area? Are you looking to fully sound proof the room? If so I would say the best way os to build a room within a room but there are other new poducts out there to keep the noise contained to the room. I would also suggest running conduit to any location you may want to have wire running to, this way you can later pull wires thru the conduit as required to those locations, ie subwoofer/speaker locations etc..

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