Yo MC.
I have 12 & 10 B4's.

12 & 9 would be a better combo but I wont go into that.
I agree with Junglist, anything bigger than 12m is a waste.
Dont spend your hard earned money on a 14m which will get you going in 2 more knots but will be so much slower you wont enjoy this kite.
Unless you have alot of 13 to 15 knots days when the 12 wont get u goin,
dont do it !
Here in SA a 12m is the biggest kite needed.
It takes newbies a few years to realise this!