Those infinitys also come in the 5 1/4. Crutchfield it is. What headunit are you using?
I have a JVC KD-AR5500 - no ipod lover here, but I like having my MP3s. This one plays off of SD cards, as well as controlling the CD changer in the trunk and the Sirius radio.
AND I can load pics of my car in, although it is not a full color display. That came out the next year, and is FAR more entertainment than I need in the car.