Hey Newguy, what 12m FS are you thinking of? Like any kite 'it' won't be too big or too small, it will depend what wind you take it out in. I'm not sure what 200lb is in stone, and cba to look it up now, but as you already have experience with other kites, judging by your sig, you will be fine around 12 to 15mph, probably underpowered, but you'll get used to the pull and work out your timing and balance. Speed 2 are nice and solid, Speed 3 are nice and grunty, Speed 3CE really nice control, stability and power, Speed 4 slick and floaty, Speed 5 another planet, everything you want and more. Like any kite, take it out in lower wind, get a feel for it, then take it out in more wind when you are comfortable with it. Don't worry about what people are flying on the water, you are just learning to board, start gently in lower wind with the 12m, get moving, get your basics done ie start, stop and work on it. In my opinion a bigger kite in less wind is better, you don't want a whippy kite in high wind wanging about while you totter about on an unfamiliar board! Good luck with it, avoid soft sand unless you like the taste! ps if you getting S5 maybe try it in 10mph first!!!