On a budget, your crew can act as the counter weight against the 1180. Worst case, you can dump weight out the front but that boat loves nose weight.

I was more pointing out that if you are going to upgrade to anything, might as well go as big as you can. You would have to measure out the lockers. my frame of reference is 05 21v ... 750's filled it. SSV is a little different, bigger back there I thought.

full stereo upgrade you say?

Oh, yes wakemakers offers a forum discount.