I've been riding the Cabal SX 51 for the last two seasons, and it is the most fun I've ever had kiteboading -- flat water, surf, high wind or light wind. My local shop (Storm Warning) has the Cabal Fire 50's in stock, but I'm going to wait until next week, when they're supposed to be getting the Cabal Fire 52.5's. I definitely prefer the slightly larger sizes for super light wind efficiency. Hopefully I'll be able to add my 2 cents on the Fire review soon.
By the way, the skims are fun with or without a kite. For those of you who haven't seen the state of the art skim moves, check out:
http://www.skimonline2.com/multimedia/v ... review.wmv