i would go with the 156, contrary to popular belief the board size is more geared twords weight rather than height. I just bought this board this year and for the price it is awesome. It has some flex to it but not too much and as far as the magna traction(it is awesome, kiss those times when you lose an edge on an ice patch goodbye!)...a board with out it the edge has 2 points of contact with the snow and with M-T it has 7.... so with all the aboved mention this is a great all -mountian board, as far as wide or reg, i ride with a size 11 boot with room on my wide, so best bet would be to find a dealer that carriers the board and step right on and you should be able to tell. you might be able to get a reg but the carbon credit has kinda a medium wide so the wide is slightly slimmer than what you would expect