Day 2
They're in, and looking rather handsome to boot. However, I'm keeping the old cables, with labels, just in case. These observations and findings are purely subjective, but here goes.
For whatever reason, the overall sound seems a little brighter. (I could be mistaken, but...) Ordinarily, I keep treble/bass set to flat, the LFE at 0db, and all speakers set to small with BASS handled by subwoofer.
I changed all speakers to large except the rear centre, and set BASS to BOTH, to get the nice warm sound I used to have.
Any ideas?