I would suggest a 4m Ozone Flow/ Flexifoil Rage / HQ Beamer / Peter Lynn Hornet/Twister/Core (probably all 4m unless it's pretty windy, then you
could step down to a 3m) I've got a FF 6ft Stacker and don't think it would pull the skin off a rice pudding whereas you'll struggle to hold your
ground in 13mph plus with a 4m. If you're only going to static fly, then a 3m will do the trick - and ok for the buggy in 15mph or so.
At the start of this vid, I'm flying a 2m Beamer and it's pulling my 180lbs through the sand pretty easy - you'll also notice it will probably turn a
lot faster than the super 10 (assuming that's slower than my stacker 6). Skip through to the end of the vid and I'm static flying the 3m Flow -
plenty of pull there in 20mph.
Having the four lines makes it a lot easier to launch and land than the two line foils and not any more difficult to fly
Beamer 2m/Flow 3m video