Well done, Josh! I like E53s in silver, and the five spoke wheels look best on them. You can add the auxilary input to plug in an mp3 player if you aren't 'old skool' enough to be satisfied with CDs [I'm from the cassette 'mix tape' era, recorded from LPs, myself
]. I think it will work on an 03 sound system. My aux is in the workshop 'to do' bin, possibly to be installed this weekend