Of the ones you posted, I think I like #2 the best. I really don't like #1 with the dog on the guy's back, though maybe you could situate it so the dog was in front of you. #3 just looks a lot like a regular tote bag to me. I can't recommend any personally since I've got bigger girls who need the sturdy carriers.
Good luck!
I forgot to add I have read good things about Celltei carriers. Here is a link to the clearance section:
http://store.celltei.com/sp20susa.html. Hopefully, they will have something similar to what you want in your price range.