Going up from a 2080 to a 3070 gets you 2 more internal amps (7 to 9) and 2 more process channels ( 9 to 11)I totally understand your position. I don't like the noise either.
I tested my old RX V473. It's been sitting in my closet for a few weeks. Plugged it in with nothing connected (red light, standby) no noise. Turned it on. No noise. Kept it on all day until it was nice and warm. No noise. Selected it off to standby mode after having been on all day. No noise.
So. I am well within my 60 day return period with Crutchfield. I could return the A2080 and get the A3070 for $150 dollars less. Hmmm. I'm also considering switching to the A1080, and eventual outboard amp. Opinions?
Going down from a 2080 to a 1080 drops 2 internal amps (9 to 7) and drops your processed channels (9 to 7) as well.
Just in case you were not aware, adding an external amp to a 1080, is still limited to 7 channels processed, So 7.1 or 5.1.2 only
Unlike Denon/Marantz lower models, only the top Flagship Yamaha 3060/3070/3080 can expand the number of channels by adding an external amp.
...So unless you just want an outboard amp for extra power, you probably don't want to step down.
1080 = 7Ch so you can do 7.1 or 5.1.2 (and both subs are on an internal Y splitter)
2080 = 9Ch so you can do 7.2.2 or 5.2.4 (Individual Sub outs, EQ'd separately)
3080 = 9Ch on its own can do 7.2.2 or 5.2.4 (Individual Sub outs, EQ'd separately)
But only the 3080 has 11 CH processing, so can expand to 7.2.4 with an external amp added for at least 2 channels
I went with the 3070 myself, it was $600 cheaper than the new 3080 at my dealer.