OK Guys before I get Hammered here I'm not Fat I'm Just big Boned

I'm new to the sport and have booked lessons for next week with Jason down at Brighton, what i'm chasing is firsthand experience from the big boys that Kitesurf.
What worked the best for you guys ?
Did you guys buy a board that you could develop into say a 136-140 or did you use a 6ft mal ?
I'm going to head towards a 11-13m Kite depending on what feels good for me but i'm more than intrested on what worked for you guys.
Will be hanging around the sandgate area as I live local to there.
I'm working on braking out of the 100 club 2kg to go wahoo double figures again.
anyway any advice would be appriciated.
Cheers
Richard
PS: i shiftwork so would be intrested in catching up with any other poor souls looking for midweek partners!