FWIW, I'm 6' 0", 200lbs. and I ride both a 162W CX and have a 165 Barracuda. I went up in size because I wanted an unsinkable pow deck regardless of the "Raduction" recommendation that Burton makes. IMO, while the rocker nose helps keep you up on top, float in pow is also determined by the surface area of the base. The size up also added a little extra waist width which I wanted because I wear a size 12 boot.
The most riding I've done on it was during a week in Revelstoke B.C. last Feb - March where we had 40+cm one day and 28cm or so the next. Not only did it power through thigh-deep blower, but the short camber section between the binding kept it nimble enough that I had no maneuverability problems in the glades. The longer nose does add a little swing weight, but nothing I had an issue with.