Hello Adamaski,
I dit have a similar setup
1) 8k/L/R-5.5kVerticalC-and 5kC rears
2) 8k/L/R-5.5kVerticalC-8Krears before I switched to
3)All 8k over and now have
4)front 8k rears 5.5k and would go finally
5)front 8k 2(2)5.5k rears and 5kCsides.
The most important factor to get a better matched soundstage and get ore detail more precise was going from 5.5VerticalC to 8k center.
My decission first going to an upright 5.5kC was the difference horizontal top vertical.
So I believe when you just swap your horizontal center to a single 8kC that would be a big move.
Talking about the 8k sound presentation, their ability to deliver bass " without" limits,
its a little dangerous as the user (I only can make starting from myself here) is trying to "have" that bass everytime. Bass is very important and very positive for the music,but too much bass "close" the details as just the mid/heights are more silent.
You should try following:
Take music without electronics and voices and with some and many instruments(many instruments playing at the same time) and listen to your equipment JUST in direct(not stereo).
Then try to compare that sound what you heared with B&W.
If you are mean your are still "missing" detail,then just take the MSR and turn down the bass 5to 6 steps and the height on 2-3 steps(just to try not a final adjustment)." Suddenly" you will hear or
better say mean to hear more details-this is my experience here.
Of coarse its depend on your listening room,of your ability to hear higher frequencies and your personal sound test what kind of sound is finally in your ear and your brain-thats determinate how "good" is the sound for you.
This sound change experience is different to George +3dB trick where the whole frequencies of the music get clearly better(thanks again here George).
After trying that and listen (you also can make two presets just the bass/high are different)to that two different adjustments I think you will get idea what I want to try to explain above.
What I dont like since the last ten years or so, is that most off the manufacturer make a "forward" sound with much to much height and mids to be "transparent" and have "detail".This is for me an unnatural sound and I dont like it.Dit you ever heraed a live voice-instrumental presentation(without every electronic !!!) like that?
Shurly not because that is not a natural sound.
Getting more details is good when you really get without loosing something else .
Try this direct experiment, if you can try a 8kC and or before a v6 -but I never would go away from the 8k..
Robert
800v3/218/271/8k.2/5k5s

/5kC/DSP3200/Reviver/
TT-ELP/Graham Slee Revelation/Trinnov Altitude 32/OPPO 205
__Ayon/HB/Shunyata/Miltzow -- power cables,
__Ayon/Jungson/Miltzow --analog, Miltzow-- digital,
__Vortex/WMA ,