I agree with you on turtles, it just falls flat for me. Great looking machine, art is spot on. But something about it just makes me loose interest after a couple games and walk away. I don't think you can go wrong with any of the other 3.
I have a DP prem on order, i like it much better than the pro. Would love an EHOH, but not for the going rate. Avengers has great gameplay but is a bit generic with the them integration imo.
Maybe post up a trade a take whichever offer you like best?