I am currently working on a kite wave board and I decided to go the epoxy and s-glass route. I went with the Resin Research Epoxy from http://www.fiberglasssupply.com
and I have to say it is awesome. I went with this resin because it was reasonably priced and it was made for glassing surfboards. It comes with 2 parts resin, 1 part hardener and I also bought a bottle of Additive F. Additive F is the epoxy equivalent of wax in polyester resin. I would highly recommend this resin if you are thinking about using epoxy.