Originally Posted by chriskayaks
For a beginner kayaker I always recommend a sit on top kayak.
If you plan on boating whitewater don't waste your time or your money on a sit-on-top...
A few good choices for you would be:
Chances are you will want a medium based on your height and weight. The best thing to do would be to look on the SWAP link at the top of this page, contact a few boat owners, and take a road trip. You will likely spend about the same amount you would to ship a boat, but will have the opportunity to sit in them and make sure they are comfortable (and maybe even get in the water to try them out)...
Good luck and welcome to the sport!