Hammer,
I have the 750s in my lsv.. if you fill them full for wakeboarding, you will need more more weight in the bow.. Some guys add 400-600 to the bow to run the 750s full .. I pulled a kid who could REALLY throw some tricks last summer and he wanted it sacked out.. we filled both 750s and he brought a sac that we put in the front walkway that was about 300 and still did not have enough weight in the front (along with the 400 center locker).

I actually use 400s in the rear for wakeboarding and switch to the 750 for surfing now.. but I rode fror 1 1/2 years with 750s just not full for wakeboarding..