The Baggs PADI is thought of as the "Swiss Army Knife" of acoustic music sound tools. It has a great feature set and can be used on everything from Bass, Cello, Acoustic Guitar, Mando, etc.
I have used one for the past 5~6 years and it goes to every gig. I also have used this on literally hundreds of different instruments as part of my sound service and it never fails to make them sound better.
You may also want to have a look at the Tech21 SansAmp Acoustic DI (now known as the ParaDI). It's not as flexible as the Baggs for tone shaping, but if you already have a relatively tame pickup system the SansAmp has a very nice warm sound.
I own both and could be happy gigging with either.