The W11 might be too much, I have the same feeling about my room, I'm not even sure I can make proper space for the W8.
I listened to them at Perfect Sense showroom in Stockholm. It's a really good room, probably the best I've ever been to, with a lot of acoustic treatments and a lot of space and last but definitely not least, lot's of great electronics to choose from. I listened with the CH Precision C1 and A1. The W11 is there as well, just didn't have time for them. In a way I almost wanted to listen to the W8 to be able to put them aside and move on, I kind of expected I would like them though, but now I cannot stop thinking about them.
Have you tried moving them out from the walls, like a meter or more, even if only temporary? This is not practical for most (me included), but according to some reviews this is where real magic happens, and maybe it can be worth moving them back and forth every now and then.