HI, I am looking to upgrade my 2003 SR5 basic head unit to a Scion head unit as has been suggested in this forum. I note that two different models are used, the 1808 and the 1809. Any preference between the two or is there another scion model that is recommended. I think that the 1808 looks a bit cleaner but other than that I am not sure what the differences are. Both have sat capabilities and with a cable can accommodate an ipod. other than the two or three connector cables the swap looks pretty straight forward. Any suggestions on speaker upgrades or is that not necessary with the head unit upgrade. Thanks for the suggestions. Great forum. Phil