I'm going to resist atmos and try to keep my x4000 at least for a few years. I got it when it was on sale for 1k. It's way more than I ever thought I would spend on an AVR. But that's the HT hobby for ya. Start out with $1000 TVs. End up with $1000 just for your AVR.
Main room (3D blu ray, PS4) - LG 65EG9600: Denon x4000, Klipsch RC-62II, RF-62II x2, RS-41II x2, SVS PC-12NSD + Klipsch RW12d
Couple small LCDs - PS2, PS1, Dreamcast, N64, 3DO, Saturn and other various retro game collections MINT COMPLETE games