You gain more control running active, but it can be a daunting task at times to get dialed in right. If you've never run active before, try using the passive first. Then you can get a feel for how they should sound. Then if you feel the need, you can move to active and have a better idea of how they should sound and blend.
It may be conceivable that a lot of speakers with passive crossovers sound awesome in your car. However, active crossover is a tweaker's heaven. You can learn a lot about your audio system when you try to set gains and time alignment. Also, if you need 3-way front or you want to use raw diy drivers, active seems like the way to go. Going active shouldn't be too expensive. You just need 2 extra amp channels and an active crossover. I have seen on sold for like $100 (Coustic XM?)