Well my old reciever just took a crap and now am im running my old computer speakers and they ****. So i am kinda new to home audio......i want a reciever that puts out about 50-100 watts a channel and i would like it to have 4 channels....also i am probably goin to be addin a sub later....so how do i go about doing that? Any info is great...not really sure whree to get the stuff either.