I'm going to chime in here and wonder if this fastination with all out speed is somewhat out of place with reference to paddling. Yes indeed it is nice to have a fast kayak, but if speed is your real interest, then I have to also wonder how paddling is going to satisfy that lust in the long run.
Let's get honest, guys, there isn't really that much difference between a super fast kayak and a so-so kayak. What?--Maybe one point something mph? If competition is your thing, then go for it, but for just enjoyable paddling, I want a boat that cruises with ease and is comfortable and dry in the rough stuff and won't put me upside down if I get sloppy. Oh, and the boat has to look good.