if you get a mag pump, you'll be happy either way.
I tend to agree here,either will rip,what I ponder is what would the diff be between a 144 pitched a little high and a 148 pitched a little lower for the same motor,in terms of thrust for what we do. the 148 will load the motor a little more but pitched down to correct it,you are getting the same result as a 144 right but moving more water I would guess it would take the ski less time to get up to the speed of the motor at least in the low end mid range area?
Another thing I dont get is why you would want more bottom end in surf than freestyle,are we not up to a much higher speed in most our maneuvers than a freestlye trick in flatwater. I see what you mean about spining the prop off the bottom with a dry pipe and hooking up in the mid where the pipe makes sick power,I didnt realize a mag pump would spin at all pitched to make power? also wouldnt this still make it harder to initiate the timing of a flatwater freestyle trick with the lag of the prop spin? I know malone uses a 145 mag and he is making as much if not more power than most,Are his setups with dry pipes designed to spin " cavitiate" of the bottom also?