"I am an intermediate sailer, can water start consitantly, but can not jibe yet. I want to end my swimming career and buy a board that gives me a good range of options that allows me to go out on lighter wind days as well as when it really blows. I really have no experience in choosing the right volume for a board and would appreciate any advice, even from a basic level."
Was the original "question" !
A good "allround" 105 to 110. (even 115 !!) would be fine.
kombat; kode(???); style; synchro. xtc. not too slalom dedicated.(Not futura !)
even a Hawk or Eagle. try a few in conditions you mention.
There are LOTS of boards that even though the have get home buoyancy work great when overpowered. (S type is at its best then)