You should also talk to Don Baker of Sesuit Creek Outfitters in East Dennis (mid-cape). He is very knowledgable on the topic of kayaks and carries a large variety in the shop. I have been interested in the Ocean Kayak sit-on-tops, they are really stable and although they aren't made for speed like the eddylines they are so easy to get on and off. They self-bail, have watertight storage, and come in a tandem model too for those who are lucky enough to have significant others who fish.
Inflatables have piqued my interest too.
He also offers rentals and has a yak guide working out of the shop. His location is right next to the Brewster Flats, making a rental more than just a paddle session.