I just got back from these guys (Mark and Shawn), and all i have to say is wow! They carry Memphis, Alpine, RF, Pioneer/Premier, Sony, Directed, Boston, JL, RE, and a few other i cant think of. They have everything wired up to listen too and are very friendly and helpful. Also the only place i know of that has a 22" Jackhammer in a box and ready to go if you want!
Also be sure to check out their Glass room filled with high end systems for demo!
EDIT:(248) 334-2519 314 W Walton Blvd, 48340, MI