My name is nathan, I am a youngin, 18 and graduating high school later today. I am a part time mechanic, i have always been into cars but just recently i am starting to get into biking. About a month ago i bought a 10 spd huffy carrera i found on craigslist for $20 dollars.In the last month ive probably put about 250+ miles on it which is alot for me but probably not much for you guys. I am lucky to living a 1/4 mile away from a bike path that can take me wherever i need to go. After yesterdays ride about 30-40 miles through some rough urban areas that would have been more suitable for a mountain bike my rear brake became mangled and i think its time for an upgrade as many other things on the bike are not up to par. I rode my 20 dollar bike enough so that i could justify buying a nicer one so if anyone has any suggestions on what bike to get next for around 500 or less let me know, I am 6' tall and preffer to be high off the ground so a long wheelbase or big bike is preffered.