I own a 3050, 2050, and 3 1050s (all in different systems of course), and the biggest difference that I can tell between them is the number of channels supported (I don't use zones, just lots of systems
). Since my systems are all quite different from one another in different rooms and with very different speakers I can't really do a fair comparison between the AVRs. I am happy with them all though.
My main room has a cx-a5100 paired with Outlaw amps and that room sounds the best, by far, of them all. It's a much larger room with high (10ft) ceilings and lots of sub woofers (4 Deftech BP8080STs with built in subwoofers and 2 Trinity Signature subwoofers).
1) JVC DLA-NX7 & Sony 65Z9D, Yamaha CX-A5200, Outlaw Audio 7900 & 7700, UDP-203, DP-UB9000, UBP-X800M2, Roku Ultra
2) Sony 75Z9D, Yamaha RX-A3080, 2xOutlaw Audio 2200s, UDP-203, UBP-X800M2, Roku Ultra
3) Sony 75X940E, Yamaha RX-A2080, UDP-203, UBP-X800M2, Roku Ultra