I saw a link for an aftermarket DVD/NAV HU for E39s. Can't seem to find it. I know there is probably a forum that already spoke to this, but if you buy an aftermarket DVD/NAV HU, does it usually go where the tape/cd deck is? If so, that would be nice as you can conceal it with the OEM flap. Also, would the flap get in the way of DVD/NAV HU operation? Assuming the motorized screen doesn't clear the dash that much. Any help would be appreciated. PS. Any suggestions on what and where to buy an aftermarket DVD/NAV for a 2000 (E39) would be great. I think I would like to spend no more than $2000.