I did a little of the wakesurfing before i got rid of the boat. You are going to need a lot more weight to wakesurf. I ran 1800 lbs of ballast for surfing plus people. I had 3 350's(the same ones that were down in the sides for wakeboarding)one in the bow to the side one in the back over the cupholders in the floor, and one in the back seat. they all have to be as far to the side as you can get them. Then i took a 750lbs sac and laid it over the back sac and compartment and swim platform. You have to tie this one down or it will be in the lake after a run or two. Its not fun to get out....trust me.
I wakeboarded behind the boat once with this much weight. I didnt think the boat would pull me up and get on plane but it did. It was a great wake.
I just recently tried wake-surfing on my buddies' boat (Mastercraft X2 ski boat with sacs) and it was INCREDIBLE Y fun! so I'm VERY interested if anybody has had any luck successfully finding a setup that will get them the wake necessary. Sounds like you need more beyond what were looking for in a wakeboard setup.
H-do-O, sounds like you found success!, although it sounds like quite a bit of setup/hassle/trouble/time-consuming maybe.