I really enjoy my Kenwood X993 single DIN. I bought mine new in 2008 for around $300 I'm sure the price has really came down.

It is one of the few HU's that all you you to control the music selection through the Apple product itself while in USB Mode. You are still allowed to cycle through the folders and playlist with the toggle ***** on the headunit but it is more user friendly being able to change songs with the player itself.

Other Features
:The Headunit also incorpates a 5 band EQ (very neat sloped graphic)
This unit can really improve the Sound Quality of the Stock System
:Built In hands-free Blutooth with external mic
:Crossover slope adjustment at several Db increments
:Infinite Range of LED Color's (I am able to perfectly match the head unit color to my green gauges for nice OEM look
If you decide to go with this unit, let me know if you have any other question

Here are pictures of mine installed on this past thread.
https://www.crossfireforum.org/forum...0-install.html