If you don't want to tweak the tone, you can't go wrong with an LR Baggs Paracoustic D.I. I have used it many times silent stage with my Sadowsky and everything set flat on it. It sends a nice, hot uncolored signal to the board. Plus, you can shoot phantom to it and not have to worry about a battery or ac adaptor. They also work well for acoustic instruments, so you get a little more diversity from it.
If you want something with tone shaping and color, the T21 sansamp bass has been around forever and can easily found for less than $200 used. They are around $200 new. They work pretty well as long as you don't get too extreme with the settings. If you push the "tube" effect or other eq too far, the tone suffers. They also can choke the highend, depending on the settings.
The Sadowsky one is nice. It sounds like a Sadowsky. You can decide if that is good or bad.
Truth is, there are a BUNCH of them out there that are going to color the tone somewhat. MXR, Ampeg, etc. They go on forever. It is a matter of taste. Best is a relative term.
Of course, a good old Countryman will never let you down.