As Kev said before he had to throw the tope story at us again......
Depends on your ability, how far, fast you want to paddle. The longer/thinner kayaks will get you there faster, but tend to be more unstable and harder to turn if you need to turn quick. The shorter wider kayaks are stable and quick to turn but can be hard work if you have a fair paddle to a fishing spot. Worth renting one for an hour and trying them out. All kayaks will be pushed about by tide and wind. The longer ones will punch through easier. Inflatables sit high out of the water so wind is a bigger problem.
If you a