Sure they are, just jump on Google and look up Home audio amps just like you've done with the Denon AVR. Theres ATi amps, Parasound amps, Monoprice amps, Outlaw amps, Yamaha amps umm its a Long list out there. As for driving your setup with just a AVR, depends on the speakers how far you sit from them, your room size, what Subs have you checked out? again 12" sub? 15" sub? SVS got killer subs from about umm 999.00 up to 5K big boy Subs. Again long list there also they come in all sizes and colors. Start with how much your willing to spend and go from there. Look at your front 3 first LCR. Want a good front sound stage? Don't cheap out! 2 to 3k on those maybe 4k. Do your own research, check out Genes home page Shady J has done some really good articles on tower speaker and bookshelf speakers. Look up speaker threads and audio amp, AVR threads on Genes home page they are loaded with a wealth of info with test all free! happy hunting!