I heard a very significant improvement in sound quality when I switched to 3.3V on the 902. I’m sure this is a combination of improved power supply (I use the Ian Canada 3.3V mini + UcConditioner combo referenced here), as well as bypassing the 5V->3.3V regulator on the 902.
I did not purchase a 5V Ian Canada supply to test, so difficult for me to decouple the impact of the supply vs bypassing the regulator.
The 802 is interesting as well and I had purchased one to play with. When I didn’t see an obvious way to bypass the regulator on the 802, that project went on hold as I started to play with OpenWRT and using a second 902 as an access point
Very eager to hear others experiences with the 802, and revisit that project at some point if folks are hearing positive things.