Congrats on the boat - we did the same thing yesterday. Can't help you out with any setup as we only took it out on the river for the demo and the current messed with our surf settings quite a bit. one way we were going at 11.8mph for good wave and the opposite direction we were cruising at 7.8mph for a good wake - but as soon as I get this figured out I will let you know.
I am thinking about ordering some lead instead of getting bigger sacks - have you talked to anyone that has done this with their S211? I'm also following the lead post pretty closely and getting some ideas from that.