In calm water my but has never got wet on any Cobra kayak the Ocean Kayaks are notorios for having a puddle in the seat. If you always have a puddle then a wetsuit is your only option. Buy a good suit they are not restrictive at all.
Cheap suits are the problem.
If your boat stays fairly dry like the Cobras then I like to wear polorfleece sweatpants and a sweatshirt. I have a couple pair of those nylon fishing pants which are nice also. Once we get into the peak of stiper season off the beach a full wetsuit is required.