First off i am new to the idea of commuting for multiple reasons and Looking at getting a bike so i can get started but can't seem to make decisions based on current knowledge. I am looking to make a commute that is 14 miles roughly each way mainly street/bike trails with very little incline/decline. Looking for more of an upright sitting bike but on a budget. I have checked the craigslist/ebay stuff but it is all kinda of foreign to me still on what im looking for. My size is 6'3" 225 lbs so i know i am looking for a larger frame/wheel size. Any tips or brands to lean toward/away from? or maybe bike style? Thanks for any help or advice.