Even host gators $279/month package for a dedicated server would be a downgrade for the amount of bandwidth for what vgchartz currently uses. (Much less the shared servers...) (and their $374/month package is the same amount of bandwidth that they offer for $279/month, but with a better server).
In fact, host gator and dreamhost don't even advertise packages that could handle the load of vgchartz.
Vgchartz regularly uses more than 10mb/sec, and all the bulk sites that say unlimited cap you at that (if you are lucky). Rackspace would be significantly more expensive but they do offer faster connections.