well seeing as im running a much older Yamaha model, RX-V620, front speakers are jamo 707i, which i believe are rated at 200 watts at 4 ohms, yamaha center speaker and two small yamaha rear speakers and they sound great, i am switched to 4 ohm on the back of my yamaha for the front jamo 707i,s, and yes they crank. receiver doesnt get hot and sound is unbelievable, been running this setup for couple years now daily. i was told by more than a few people i couldnt run these 4 ohm speakers but turned out they were wrong, im a true fan of yamaha. only have had two receivers and both yamaha, thats how long they last. id try to find a good set of towers used, bought mine for $300.00 for the pair, they listed new for almost $800.00 apiece. if your a real music lover than youll never be happy with a cheap set. so a new pair for $500.00 or awsume used pair for $300.00 or $400.00, going to be a huge difference in quality. all you can do for new is read the reviews. but then reviews are like opinions and bu**s, and they both stick. thats just how i am, id rather pay the price for a good new set on a used great set. after all the new $500.00 set down the road are going to sell for maybe $200.00 used, doesnt say much about them. a higher end pair youll pay maybe $400.00 but then be able to resale them for $300.00 or maybe even the $400.00 you paid. check out ebay. you already have a great receiver so why not get speakers to match, by the way i also have a 150 watt powered yamaha sub-woofer, you can find them for cheap on ebay. either way good luck with what ever you choose.