What are you looking for?
Possibly more than any other instrument, you bass will respond beautifully to a new set of strings.
After all, you are dealing with some fairly big ones. If they are old and over-used, your bass tone will definitely not be as bright and full as it could be.
While you might not want to change them every night like some professionals, you will need to consider changing bass strings fairly regularly (e.g a few times a year) if you play consistently.
They come in a number of different sizes, styles and even colours.
Check out Mega Music's range of bass strings here at Mega Music Online or if you would like a closer look, come and check them out at a Mega Music store.