Which bike to buy?

[Nexium]

http://akroncanton.craigslist.org/mcy/2220373520.html

http://akroncanton.craigslist.org/mcy/2221461047.html

http://akroncanton.craigslist.org/mcy/2213834234.html

http://akroncanton.craigslist.org/mcy/2207941524.html

Which of those bikes (in my price range) would be a good fit for a 265lb beginner that will commute 20-25 miles a day?

[Viirin]

a lot of the guys here swear by the vulcan 500 - don't know about the 700 though but i'm sure they'll be along shortly