What should I upgrade next?

I don't like those speakers either so I would change those out. Plus they do seem the most dated of everything you have. If you love B&W then maybe the new diamond version which I have not heard.

I heard the 802ds in a system where they replaced the 802s and I thought it was a significant upgrade (in the high end, of course). Otherwise, have not heard any of the other components. I AM a fan of computer audio, so you might explore in that direction.

What do you think your weakest component is? If not that, then what do you want to improve? Personally, I don't like your speakers. It doesn't really matter what I think, though. You're the one who has to listen to them.

I will say that your speakers and electronics are pretty well matched. It would be a good idea to focus on specifically what you want to improve. If you upgrade something without being sure, you can easily make a mistake.

Replace the Speakers, go for something bearable, Verity Audio for example.

I agree with Rlwainwright, take a look at tweaking the room.
I would also want dedicated AC to your outlets, and speaking of outlets what type are you using?