Thanks for the responses. I enjoyed reading the blog about the red cabinet DK.
Anyway, I ended up picking on up a DK machine a couple months ago. It is in good shape (only a couple nicks on the sides, but has new side art and everything else looks great). The back panel is not original but everything else is. In retrospect I paid too much but now I know.
In the meantime I have picked up a Sega Outrun I am trying to fix. After that is going, this summer I am going to try to find a Jamma cabinet. I am leaning toward Double Dragon.