Look at the design of the unit. Do ya'll know of any HU that can be put in there in place of it? Of course a secondary one can be fitted down by the bin. Maybe someone will make an install for it, but it'll be a damn weird one. I meant to say "now", I doubt anyhting will be out in the next 6 months either.
When you replace the HU directly you lose CD changer, unless I am mistaked. Plus the stock HU is already pretty cool looking.