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Eppie
Audioholic Ninja
With 5.1.2 the receiver does a lot more than just power the speakers. The audio calibration (Audyssey for Denon) sets the cross over points for the speakers, adjust the phase so that the speakers are time aligned (the speaker distance setting) and does the bass management. You want to use the included calibration microphone and set up Audyssey per the owners manual. I can't think of any white AVRs. You will likely need to go with silver.
I like white speakers and see no problem with the swap if you already have buyers. The room looks very nice. Running Audyssey should help balance the surrounds and ATMOS speakers and you make manual adjustments as well. Is the bass boomy everywhere or just on the couch? Bass calibration will help the room but if it is location specific then sometimes you need to change the subwoofer locations.
I like white speakers and see no problem with the swap if you already have buyers. The room looks very nice. Running Audyssey should help balance the surrounds and ATMOS speakers and you make manual adjustments as well. Is the bass boomy everywhere or just on the couch? Bass calibration will help the room but if it is location specific then sometimes you need to change the subwoofer locations.