[quote name='discreet' timestamp='1361544477' post='1987297']
A replacement bridge makes very little difference to the sound of a bass, IMHO. It may be the placebo effect, who knows? I'd get a replacement bridge only for cosmetic and/or aesthetic reasons. There is generally very little wrong with the stock bridge on a bass.
Given the high price of some replacements, you'd be better off investing the money elsewhere. Again, IMHO.
[/quote]
This is my experience too. As for extra sustain, I've never had a bass that needed more sustain, it's usually the other way around and it needs careful muting.