I auditioned a D-Sonic at Dennis' place last year. He's only about 20 min from my office. Really nice sounding amp. I almost went with one. However, Dave had recommended a good class A/B amp with the RAALs; so, I went with a Rogue Atlas Magnum II tube amp. Drove my S2's (now in surround) really well and now using it to drive my Towers with RAAL (current Front LR).
That said, I may still pick up a D-Sonic to drive my Atmos and surrounds at some point. Dennis is working on a lower power multi-channel which would be great for ATMOS speakers, IMO. I believe he may also be looking at more than 7 channel models.