Loving foiling on small kites too!
4m Ozone Enduro, 5m Ozone Prototype Chrono (a beast, never released for reasons, but loving it), 6m Ozone Enduro are my preferred kites for foiling at the moment.
Easily starting in about 15 knots (lower if pushing it) and basically open top end (at least when comparing to other kiters in general, I feel like whenever anybody is still riding then I can be foiling too, of course too much is too much and too stormy gusty is too stormy gusty).
Small kites give me an enormous wind range to be comfortable in. Plus something extra on low end and top end if pushing it.
http://www.famousfrank.com/fotos