Posted by: tiva on Jun-20-12 3:53 PM (EST)
-- Last Updated: Jun-20-12 3:56 PM EST --
Hobie makes a lot of sit-on-top kayaks that have capacities well over 400 lbs. Their mirage-drive kayaks are great (I have the Adventure Island sailing kayak, which I love for windy days).
This fishing kayak is super-stable and good to 600 lbs:
This general purpose kayak is good to 500 lbs: