Tim is right on here.
Only try to run back on plane with twin 150's if you have a prop to get it on plane. Otherwise, enjoy the nice smooth rife back to the dock.
I do know a 23'CC with twin 150's that would plane on a single 150, but it was done with 16" pitch props, not 21" or 23" props, AND large tabs. It was a tow boat and propped for pulling.
On the other hand twin 250 Etecs should be adequate
My 2 cents? Big single with an 8-16 hp high thrust kicker.
__________________
Common Sense is learning from your mistakes. Wisdom is learning from the other guy's mistakes.
Fr. Frank says:
Jesus liked fishing, too. He even walked on water to get to the boat!
Currently without a SeaCraft 
(2) Pompano 12' fishing kayaks
'73 Cobia 18' prototype "Casting Skiff", 70hp Mercury