Double dins are always fun, but unless you want dvd or nav, there really isn't any need for it.
Im going to have to disagree here. It is far easier to search through ipods and usb drives with a touch screen vs the 2-3 line display on a standard radio.
Also a backup camera is a great addition as well.
If you want a quality screen for a good price this is about the best you will find. http://www.sonicelectronix.com/item_74584_Pioneer-AVH-X1600DVD.html
Not alot of fancy frills but it gets the job done while not being a pos.
That site also gives you up to $30 on install accessories.