know that most of the guys on here aren't to crazy about them but you might try one of Hobie's Rotomold boats. You can't hurt them, they still offer some performance and they can float alot of people and weight.
The roto boats are great if you're never ever going to even think about racing! At your size though, the getaway is the best roto boat for you.
If you want a full-bore racer with a steeper learning curve but the best of speed and fun, then you can go F18 (spinnaker).
