I have the DMT 1200 and the 8k and I REALLY don't like my 8k anymore. Way too rough. I would go with the Shaptons if I had to do it over again.

I like the idea of a stone that reacts the same all the way through, not slowly wearing out like the DMT's.

I still use my DMT 1200 (never used the Shapton 1200), and like it now that it's broken in, but I defer to 2Sharp on that, he knows his stuff!