a foil will do good if you can handle it
the flysurfer kites are excellent babies, the mastair 16 has the best low end i know - 7knots are enough for 160 tt and 75kg rider to go upwind.
but you're right with the prize.
if you know anyone who has a mastair 16, suggest him to try the brand new psycho 15.5 (in stores soon) and he'll sell the mastair ...
the wipika freeair 16 is another lightwind wonder - they measured wrong - it's 18m or something like that.
i know guys who have the freeair above their 11.8 airblast...
if you're able to fly a foil using handles with your eyes closed when someone wakes you up in the middle of the night, you may also buy the mosquito, but look a bit and you'll get it cheaper!