Depends if you're looking for surf or for wakeboard wake. I've got an 09 21v which I think is different layout, but we went from 400 to 750's in the back and kept stock front. I think you can fit a bigger front sac than I can -- the boat can definitely benefit from some more weight up front.

From what I've read you need to upgrade/reinforce the rear engine compartment with the 1100's in the rears - it's posted here several times by others who put some L brackets in, or you can crack that part of the boat. I would say the 750s still are a bit lacking for surf in my opinion, but I don't usually have many folks out with me, just our family.

We're beginners, so can't give much advice on the wakeboard wake part of the equation - even stock wake is pretty intimidating still to us