I'm driving across the country in 2 months and i dont have a proper zoom lens. I am also extremely broke so my budget lies around 450ish but i'm prapared to take a hit if its really not worth it for the bellow listed.
canon 70-200 f/4 USM (non-IS)
tamron SP AF 70-200 f/2.8 non is
sigma 70-200 f/2.8 EX HSM II
any advice or recommendations would be greatly appreciated.