26 year old male in the Philadelphia area. Currently riding a 1970s road bike and looking to upgrade. Do not drive, bike will be means of transportation. Max budget is 700, maybe 800, but I'd have to find a sick deal to break the bank. I do not want a commuter bike, I want a light, fast road bike that I can ride long distances. Given my budget I've been operating on the assumption that a used bike is my best option, and browsing craigslist,but I'm obviously open to a new bike. Any suggestions? Especially sites other than craigslist where I can find a used bike I am 5-11.5 (true barefoot height) and 165 pounds. Ride a 58CM right now