My '02 has a ford mpi 310hp 351. I use stock prop, have had it loaded with my stock ballast, plus 300 lbs of lead (equivalent to team), and have had 10 guys in the boat, no problem with lack of power.
i personally think that some of the bigger motors are a waste, just take up more fuel (but what do I know?). I doubt that pulls that are too slow are a difficulty for someone using a 310 or 330 horsepower motor. And even if it does take an extra second or two to get up to speed...well, I save a lot of time by not having to refill the tank during the day.
We used to load up my 275 hp TBI Mastercraft, and i thought it did just fine as well. Spend the extra dough on something that will make a difference, like a nice board or something. Just my $.02...