@boodaddy: You are doing the right thing by waiting. Around 2001 I jumped at a Dolby Digital only 5.1 receiver. It worked fine of course but within a half year DTS began to appear and to my dismay movie after movie came out with a DTS track which I couldn't play as well as a DD track. Before long some films were carrying only DTS and to add insult to injury it was DTS not DD that became the soundtrack of choice for most home theatre enthusiasts. I had to wait until 2005 before buying a receiver capable of playing DTS. I made sure in 2011 when I went to lossless sound that my receiver could -play both Dolby True HD and DTS-MA. As for ATMOS, I'm on the fence. I'm not sure I want to add any more speakers to my system. There's also the WAF to consider.