I have noticed a trend that people have been recommending smaller speakers-with sub of course- for HT only setups. I had been planning on purchasing Polk RT25i's, CS245i and RT15i's(rear). My local retailers have been suggesting the RM6600 system, saying I won't need such large speakers as HT doesn't need the punch that a music system requires. I will be using the setup for movie watching only. Would I be better off? The only difference I can hear is that the larger system plays considerably louder, but at normal listening levels, there doesn't seem to be that much of a difference. thanks!!