Howdy all,

Recently decided to start commuting to work. Deciding that I to be a cautious as possible, I promptly went out and bought a...

...clunker from Craigslist. Been riding around after work for the past few weeks and I feel like the muscles are ready for the daily 6 mile round trip. Got the practice, the training, and the gear ready. The problem? The bike. Even though I got it tuned up, it was someone's project bike that they assembled from random parts. They're good parts and the bike rides super smooth at a casual pace, but the bike creaks when I try to sprint, my foot touches the front wheel from certain turning positions, and it doesn't feel stable at faster speeds.

So back to Craigslist I go. I'm looking for a full sized hybrid bike that can be used mostly for commuting on pavement and the occasional flat dirt path. I'm 5'11, so I'm guessing the frame should be a Large? Here are the bikes that I found that I THINK match what I'm looking for, and I'd love your input.

http://orangecounty.craigslist.org/bik/2559204792.html
http://orangecounty.craigslist.org/bik/2608871806.html
http://orangecounty.craigslist.org/bik/2608583791.html (Not sure bout this one, don't know what a multi-track bike is)
http://orangecounty.craigslist.org/bik/2597364400.html (The one I'm leaning towards)

Any advice is appreciated!