I recently played DI for the first time and was really impressed. It seemed to have the right balance of everything and very premium feel. I felt like the game did a good job explaining what to shoot for and gameplay felt very engaging. Theme is kind of neutral and some of the phone elements like emoticons may wear thin quickly. It's a game I think you should get a lot of plays on before deciding to get one. I still like it a lot more than WOZ. Could never get into that one. Maybe it's the theme but gameplay just seems a little slow and boring at times.
Smart thing is probably buying two nice classic dmd games instead of one really expensive new pin. Problem is always finding the games you want in good condition and then dealing with typical issues of older games. You could even get a nice Stern pro and a good classic game for the same money as DI. Having more games means more people can play at once and games don't get old as fast.