Welcome to Bike Forums..
Bikes are like shoes, one needs to know his size.
Visit local bike shops and get an idea of your size and what type of bike you like.
http://mobile.craigslist.org/bik/3614996383.html
http://mobile.craigslist.org/bik/3610511138.html
http://mobile.craigslist.org/bik/3601971468.html
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Fred "The Real Fred"