I'll play too... all of the advice so far is dead on. I would also vote for a waroo as a first kite. It's cheap, has a huge range and is easiest to find.

There are plenty of better kites but they will cost 3 to 5 times as much for 5mph more of top end and possibly 2mph better bottom end and a longer lifespan.

I currently own two waroos (16m and 12m) and I am 195lbs and can ride from 8mph up to about 30mph comfortably on these two kites.

The best advice I can give you is to take lessons on a WINDY day. Don't settle for 8-10mph or you will be wasting your money. Yes it's a good day for learning to rig and launch the kite, but getting out on the water in 8mph-10mph is a waste of time.

You want 10-15mph so that you can try all of the different boards and really get a feeling for what the kite can do and for what size board you need.

Insist that you get to come back for a follow up in REAL wind.