I just got back from a trip to Palau using my new S-95 rig for both still and video. I'm impressed with it. Yeah re-focus with the video would be nice.
I also used my new Inon Le-550w video light and was pretty impressed for the output from such a small light. It's dosn't put out as much lite as the sola 800 put it was really close to the sola 600 one of my buddies was using.The sola beam was a bit wider but not as bright ( and I don't know if he had a full charge on it). For strobe I'm using the S-2000 which I've had for a while. I prefer the color spectrum of Inons strobes/lights to Ikelites, it's warmer.
Once you start adding trays and arms and such you might actually want more buoyancy so skip the case weight.
Have fun I did! Can't wait for the next trip!