I think 156 would be fine for his measurements...I measure up the same, only slightly heavier, and I have a 156. However, I'm mainly jibbing and riding park with that, so it suits my needs. However I would go bigger if I was riding pow pow or bigger mountains. For bindings, sierrasnowboard.com has leftover '07 burton bindings for siccccck prices...you could get burton mission ltd's for $79.99, burton cartels for under $120, and p1's for $130.
For boards, you seem to be pretty into Forum, which by all means is a great brand, but I'd also check out Gnu and Lib-Tech, like the Gnu Carbon Hi-Beam and Rider's Choice, or Lib-Tech TRS.