I've got the next model up, the TXSR674 and I've been very happy with it. It was my first real home audio receiver but I had no real problems setting it up. I don't very much about the unit you're getting but the 674 has two HDMI in ports and an HDMI out which has been pretty useful to me. I'd make sure the 605 has some sort of HDMI support. Speaker wise, I went with an Infinity 5.1 channel system. Its pretty much the perfect size for my room (~12x15) and with a good Dobly or DTS source, it sounds amazing.