This is a really dumb question, so please don't bite me! I'd like to improve the sound quality of my TV/DVD, but would find it v. difficult to use rear speakers because of the room arrangement (in addition, I'm honestly not all that fond of rear sounds anyway). However, I would like to be able to distinguish the front left and right effects and music from the dialogue. I'd also like a subwoofer to deal with some of the effects - we have a good quality Phillips set, but some of the bass notes obviously trouble it. Okay, so here's the dumbass question - if I buy a 5.1 system, can I use it without using the rear speakers?