My vote would be AFMr because I think it has a nice open layout, the callouts are hilarious and well done and there are still little easter I am finding even months after owning it. My wife activated cows on saucer video mode this week and didn't know WTF was going on... comedy.
That said, if you want something truly new or AFM doesn't appeal to you, then DI is a no brainer. Played it at Replay; definitely a fun table. When I had to make the choice, AFM was just a must have. As much as I enjoyed DI there was no way I could get it ahead of AFM.