The Distressor is one of my favorite compressors and its made by Empirical Labs which is owned by Dave Derr. Its a versatile unit which can give many different sonic flavors. For instance, the 10:1 ratio emulates the LA-2A. It sounds great on vocals, drums, bass and guitar. The Dist 2 setting gives a tubelike quality while the Dist 3 sounds more like tape. This unit can be used for both tracking and mixing. Also look into the British Mode options and get 2 units for stereo if your budget allows.
For further info check the website at http://www.empiricallabs.com/
and for purchase contact Victor Rios at (802)380-9160