Dear Bstan, would you mind reading a short personal story that might help you re-valuate your goals:
When I was shopping for an upgraded espresso machine from my back then, a simple cheap one, which I quickly outgrew and developed a severe upgrade itch, I am not rich, far from it. At best, somewhat upper middle class, all self-earned, with few decent investments and long-time savings.
My budget for a new espresso machine was around 1k. I know even that number seems absurdly high for most outsiders. But after long and tedious market research, I realized several things:
a) I don't want to compromise on a few important features; this is my last espresso machine.
b) I want to be well-engineered, build, and as a result, hopefully, be reliable with minimal maintenance required.
c) I want not to have regrets later on and missing some important features
d) and finally, I would want to be able to repair it in 20 years if necessary, so commonly used off-the-shelf parts are preferred over the custom, small-run parts are.
I ended up spending nearly $2.5k.
This was almost 8 years ago, and so far, a,b, and c hold 100% true.
That doesn't mean more expensive is always better, but better products often cost more.
So, If you apply similar logic to your upgrade of your HT, I recommend rethinking your budget and going with speakers, which are not just 5 out 5 performance-wise, but also 5 out 5 on value for your money-wise.
More specifically, these:
philharmonicaudio.com
But these, like your current B&W speaker, love more power, so upgraded AVR with pre-outs (this should be must )
should be your next purchase.