I've had several different combinations of Spectral + Wilson including DMA 180.1, DMA 260, DMA 360.1 and currently 360.2. I've owned WP7, Maxx 2 and currently Sasha's. For my system goals, which mainly consist of accurate (obsessively) portrayal of the recorded event, the combination of Wilson and Spectral certainly gets me there. In fact, other than curiosity, I have no interest in any other combination. I was just discussing with friends yesterday my experience of going to the symphony on Friday night, then returning home to compare my system to the event. I was extremely pleased with how close it sounded...actually I was amazed. I am lucky enough to have some HRx recordings pretty close to what was played so that helped but it was also the amps/speakers ability to articulate that recording, I'm not sure too many could in the way I heard it.
I strongly believe that using upper tier MIT cables makes for a significant improvement and I'm not sure I would be as happy with my system without them. As for subs, I get ridiculous bass performance without regardless of whether it was the WP7, Maxx 2 or Sasha. No desire to use a sub here.