DO NOT go by brand. Everyone loves a brand and everyone hates a brand. Go by model. The linksys 3g52g3g model might be the worst thing ever made yet at the same time the linksys 3g52g3g.2 might be the best thing ever made. This is a case where picking by brand is not an option.

Get something that has replaceable antenna's. UPGRADE THE ANTENNA'S! Don't even bother looking for one that has good stuff stock, cause they all suck when compared to a few bucks spent on a good aftermarket antenna.