Well, I think you need to switch your judgment of what a good machine is by how it looks. Sure, the DMD is important, but most importantly is how fun the machine is for you to play. Personally, I really like the DMD displays and the creativity that the programmers had/have. I think LCD's look odd in a pin, but, I'm sure that will change as the devs come up to speed with that technology.
Pick games you like to play, not games high on the list or ultimately you will be disappointed with anything you choose. Along with an empty wallet...
Personally, some of the system 11 machines are my favorites, with the 'basic' alphanumeric displays, the devs really pushed the limits of those too.