I would avoid the Bose system at all costs. Bose has yet to make a product that represents at a good value at any level. Keep in mind that Bose' biggest asset is its marketing department, not its R&D group.
The only factory systems that I would consider keeping the components out of, would be the drivers from Volvo's Dynaudio system, and the amplifiers/speakers out of Lexus' Levinson system.
Even at 50.00, (it will go for MUCH more than this on ebay because all stock HUs do), you could do better by getting a used Nak, or Alpine.
Are you just filling the second location, just to do it? Or is there some feature you are looking for? How about adding some LED screens with system voltage and amp temperature? It will add something unique and avoid any needless installation of inferior Bose equipment.
