I've owned all 3 and sold them all. The only one I missed was Shadow. I bought another Shadow and don't plan on ever selling this one. To me it is probably my favorite game of the 90's era. Great rules and a unique layout which is fast and fun. I'd rank Shadow quite a bit higher than JD or DM.
If I had to pick between the other two games it would be a tougher call. I think JD is the better game overall but I think I enjoy playing DM a bit more. DM is a game you don't have to think about too hard when playing. You can kind of jam out and get into the flow and keep playing the various multi-balls over and over. The handles are cool as well. JD has great art and a better theme and a cool layout but I'm just kind of over the game. I should probably like it more than I do but I feel it does many things good but just isn't great in any particular aspect.