my bass curretnly has active pups on it so if i buy passive ones will i need to change anything in my bass??

First off: Unless your bass has EMG active pickups (As in not HZ's) your bass doesn't have active pickups.

It might have an active PREAMP, and passive pickups, which has much more options.

Depends entirely on what kind of pickups you have (P? J? MM style humbucker? Soapbar?)

From then on, let me get it out of the way. I'll recommend Nordstrands, thefitz will recommend Fender SCN's, various random people will recommend the Seymour Duncan Quarter Pounder.
you may have to change the potentiometers because active pups use different ones then passives. id also recomend fender scns.
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