There are better options for you. The sat nav unit is old hat now, but it does look ok I guess,
Ive just installed a pioneer double din, with some sand paper, spray paint and information from here I managed to get a full entertainment system fitted with great ease.
I've had loads of sat nav, from the latest pioneers to the vert first XDA1 tomtom original (awful lol).....I went for a Hd1/3 because they are ace....little things like twin view, and voice that does not interrupt your music.
Bluetooth phone, Ipod, hard disc drive (dont really need an ipod), DVD player, Aux in,..etc etc.... Get the D3 unit for about £300 on ebay!
ill upload a pic, see what you think....few others have done it too.
autolusso I bet will have the kit for you!