I went ahead and installed the Infinity 63.7i front and 52.7i rear. Pretty straight forward installation, the rear housings needed some material removed to clear the bigger magnet structure but this was easily done on the bench since the speaket housing can be pulled from the vehicle. When I had the doors apart I dynamatted the full interior of the doors covering the dreaded MB sound felt to prevent it's eventual peeling off and transfering it's adheasive to my windows. The dynamat's function turns out to be two fold and an easy job. The finished project provides a much more articulate frequency response than the original Bose speakers. bigcatny, I do hear the Bose head units coloration but with the Infinity's improved clarity (especially on the vocals and high end) the system has a very nice vacuum tube tonality now as opposed the the stock Bose speakers wet blanket sound.