I'm not exactly a premier expert on bridges, but one thing you need to be aware of (you probably already are, but I'll say it anyway) is that different bridges require different mounting holes to be drilled into the body. If you switch from Hipshot to, say, a Gotoh, there is a good chance that the holes will have to be redrilled (and possibly the existing holes would have to be filled if there is some overlap).
Good luck. Out of curiosity, why don't you like the Hipshot? And have you considered Carey's standard bridge? I remember there being some discussion about his bridge being too 'warm' or something like that, but if my Nordy (with Carey's bridge) is any example, it could tear your face off if you EQ'd it as such. Just a thought.