I have a new Infinity, and have ridden a B-Pro quite a bit lately. Personally, I don't absolutely love either of them. I do like the Ininity better than the B-pro though. The B-pro was stiffer and felt really catchy to me. The Infinity has taken some technique adjustments to feel comfortable on it. It's okay. I recently got a K2 Eco Lite as well and I LOVE it. It is by far the easiest and most forgiving board I have ever been on. I find myself choosing it over the new Infinity almost all the time. I wish I wouldve learned on it...even though K2 claims its a int/adv board. Having said all that, the Infinity does have slightly better edge grab though in hard or icy snow.
As for bindings I just gotb2 new sets....one Union, one Ride Capo. I know this goes against the norm around here, but I WWAAYY prefer the Capos! I really wish I would've gotten 2 pairs Capos.
Oh...I'm an intermediate rider. 5'9, 155lbs, size 8-9 boot.