-- Last Updated: Jan-02-13 7:16 PM EST --
Check out the Cape Falcon F-1, a 14' boat in skin-on-frame construction. Weight about 32 pounds and it is amazingly nimble, responsive, etc. I highly recommend it - you don't say where you are, but if you're close to Oregon I recommend the building class. You get a new boat and a Greenland paddle for $1300. He can custom build one for $1950. Everyone who has paddled mine has liked it and been comfortable (mine is a previous model, SC-1, very similar). Advanced kayakers can really make it fly.
PS an SOF is much easier to build than a stitch & glue boat, by the way.
PPS I have my eye on a Rapidfire or a Spitfire as well, they appeal as I am losing my tolerance for having my legs flat out in front of me for a long time. The SOF is way less money...