The MFD28 is a very powerful display that is easily added to your current setup. Taking in OBDII or CAN data, it also features 4 analog inputs and 2 speed inputs. You can custom the display layout, switch between CAN inputs, and even log the data to view in the CANchecked log viewer! Great for subtle or bold installations, you will have all the data you want to view right in front of you. You can build this into your dash, empty panel, or bet it in one of the BMW specific vent replacements available for the E30 and E46.
You can can get more details on the CANchecked website.