I will say that in general I find C2BTX style profiles to float better than R-C-R at the same length.
Never rode a C-R-C b4 but was thinking the exact same thing; say in powder, full rocker might give a +5 cm bonus (i.e. 155 rocker rides like a 160 camber in powder), R-C-R a +2 bonus and C2BTX should be somewhere in between.
To sum up, for your needs my vote goes for something in the 160cm range (plus or minus 1) with a C2BTX profile and midish flex. Either a twin or a slightly setback directional twin.
I was still thinking whether I can make a 157 C2BTX work for me. But you are right, powder is amazing but the terrain is a bit flat. So glad I made the decision to post in the forum, will look at the 160 range instead. Thanks
Last edited by Willy; 05-13-2013 at 08:24 PM.