http://losangeles.craigslist.org/sfv...688632678.html - Sounds like a nice dog. The "good guard dog" might be of some concern since you mentioned barking being an issue.
http://losangeles.craigslist.org/sfv...691199383.html - Sounds like a lot of work, and looks like a drooler, so not sure about car travel.
http://losangeles.craigslist.org/wst...639756587.html - Top dog seems abused, lot of luggage(?). Roomie might be okay
http://losangeles.craigslist.org/sfv...685735219.html - Sounds like a cool dog. Might be a little energetic in the beginning, but daily walks will mellow him out
http://losangeles.craigslist.org/lgb...683946504.html The formative years. Do you have time to devote?
http://losangeles.craigslist.org/sgv...682596955.html - The kind of dog that attacked Buddy . . . . guess I have to build my trust level back up.
All I can say is if you have never had a dog before, be prepared. It is like having a kid, except you have to feed them every day. They are work and a responsibility as they will never grow up and move out on their own. Just be ready for a commitment.