I'm assuming you want a mountain bike, and something that's a little better then a huffey/walmart brand...
May I present to you an idea:
http://www.eriksbikeshop.com/ride/p...xfk49M34&scid=SearchResults&spoffset=2&s_id=0
Raleigh's are ok, and this is $300...
Dude i'll sell you mine for 200. it has a flat tire though. It has a taller frame than most and should fit you well.
I paid like 400 for it 3 years ago and havent road it in 19 months.
It is a Fuji Del Ray, got me to and from work (5 miles) over paths and off road.