Hi guys, I want to add a 5 ch amp to my home theater to improve sound for both music and theater, The problem is that I know nothing about amps so I need your expert advice. I would like to spend $500 on used gear(cant afford new one) so what are some good brands or models to consider? I came across with following brands after reading reviews which I can buy used in my budget. Acurus Anthem Carver Parasound Quad Nad Rotel I will use this amp with pioneer 811s and infinity interlude center, front and surrounds. one more question, whats the difference b/w integrated and power amp? and which one I required? I will be really grateful if you guys share your knowledge.