Wow, I just got a rebuilt XX-2 Mk II back from SoundSmith. Unbelievable. The best my turntable set-up has sounded, even before it has been dialed in precisely on the WTA. The detail, coherence and dynamics are fabulous, with great bass. I am using it with the Dyna P75 phono stage, taking advantage of its PE mode.
Caveats: Do note that I don't have experience with other carts near the XX-2 MkII's list price. This is my first move into LOMC as well. And I have not compared this to a stock Dyna XX-2 Mk II. The only reason I could afford this cart was buying one with the cantilever broken off, and sending it to Soundsmith.