I have an Axiom rack on my non-disc bike and like it a lot so I bought the Axiom DLX Disc rack for my disc bike. I don't recommend this rack due to the fact that it is supported by steel tabs that the skewer goes through putting a lot of stress on the tab and skewer. Additionally the skewer that came with the bike was not long enough, so I had to also purchase an extended length skewer.
It I had it to do again, I would purchase the Topeak Explorer Disc Rack.