best prop for barefoot on 1991 ts6m comp

[adave]

Hi all i know the obvious answer is the one that makes boat go fastest but wondered from experience before i try swapping about if anyone could recommend best prop for top speed.
I currently have a 13x12 on the boat which seems to just get to 35/36 however will be gps checking speedos this weekend.
I also have a 14x14 in the cupboard.
What should give me best top speed and also i am assuming should be revving no higher that 4400rpm max?
Is it ok to keep at that RPM for a barefoot run as in manual says 4400 intermittent.
Years ago had a 91 nautique same engine exactly but cant say what prop it had but used to barefoot ok.(although i am now 15 stone and not 12.5 to 13)
Thanks dave