I had contact pros on my Great Dudes, and they worked fab, good lateral flex and still responsive straight back, but the Atlas is my favorite binding ever of any that I've tried from any line. It's soft enough or stiff enough to be put on anything. They'll definitely grow with you and can be put on any board you end up buying.
This is senseless talk, but I thought it was just wrong to put burton bindings on a board that was made up of members that burton dropped from the team. Then again, I also believe in rally caps, and put on my hockey equipment one side at a time. Malavitas are rad bindings though.
I've never ridden Flux bindings so I have no comment, people like them though.
I really need to try and demo the unions and the Burtons somehow. Right now I'd say it's atlas vs. malavitas.
How'd you like the great dudes? I bought my great beauties in a sale during the off season and have yet to ride it. Looking forward to getting on it next month.