i recently bought 2008 manual mustang gt and thought it was best to get some advice/ideas on upgrades from a forum.. i have the factory radio (not shaker500) and hate it.. i'm willing to put in up2 $500.. i want it to be sirius/satellite ready.. on crutchfield i was looking at the Pioneer AVH-P4400BH; but it says somewhere that i can't fit a face fold down unit in my car.. does anyone know if this is accurate? otherwise im hoping for ideas..