It depends on what you buy.
EMG's are true active, and they supply the pots and jack you need if you go with them. It's a pretty easy upgrade.
If you bought say, some Seymore Duncan P/J passive pups, you could buy a pre-amp from say Glockenclang which will give you a push/pull passive/active option. At that point you will have dumped enough cash into it that you could have bought a different bass.
Notice I didn't say "better" cause some of those 200's really play nice and have a good feel to them.
I would either go with the EMG system for active, or go full passive with some Duncan pups and new pots and jack. http://www.bestbassgear.com/
is a good source, as is http://www.guitarpartsresource.com/middle_bass.htm