Despite the fact that I really don't care for your posts on the forums I still can't sit here and let you throw away money like this, even if it is $50.
If you are concerned with the green night illumination and having a clean look why would you not consider the Alpine models? An older (3 years, but that really isn't anything for an Alpine HU) could be had for as little as that Bose unit, and would sound phenominally better. The older models (mine at the time was the CDA-7838) The truth is the bose stereo probably isn't that much better than the stock HU in the Contour. Even the best Stock systems are mediocre compared to fairly inexpensive quality aftermarket units.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=1382193234
It is the most clean looking Alpine has ever released, has outputs incase you ever decide to expand a little, and it is very reliable. Also, you will never find a green that matches this well. It is one model up from the stereo I originally had in the Contour and is an extremely excellent HU that will sound much better than the bose unit from the Mazda. I know many people who have had thier Alpine HUs since thier first car and have transplanted it as they got new cars.
You won't fill both spots with this HU but please understand that you will be getting something much better in the long run. It is your descision of course but I think you would be happier with something that both looks and sounds good if you have the choice
Understand that when I give my opinion or a serious suggestion, I am not joking around with you. I really do believe this would be the better descision in this regard.
