Hey graceful the 07 flow was a tractor - I rode last winter on a 7m and 12m flow and changed in August to the Vapors and couldnt have been happier. I am about the same weight as you and I now have a 12 and 8.5 and will look at a 5 for my wife and for me when the big storms hit!
As the guys say they are dangerous conditions but a lot of fun - we started last year with probably similar experience to what you have -just make sure there is always someone else out with you...
A final tip and the best one I reckon - get an insulated flask - one that holds about 4 litres - before you leave home - fill it with hot water - after a kite in some of the conditions we have there is nothing better than a fresh water warm shower