How much are you willing to spend on a new HU? I would check either Crutchfield first then go to Amazon to see if they have the same unit in stock and purchase there for a cheaper price.
I purchased this Kenwood unit on Amazon but unfortunately they no longer sell this unit w/ the speakers. But basically this unit has almost everything you're looking for, single DIN and volume knob. Unfortunately both the USB and aux connections are in the front.
https://www.amazon.com/gp/product/B06Y1G6VBD/ref=oh_aui_detailpage_o07_s00?ie=UTF8&psc=1
And as far as RCA preouts are concerned, it has 6 4volt preouts, 2 for front speakers, 2 for rear speaker and a sub preout. This will be good for when you decide to upgrade the speakers and get an amp for the speakers. Also I would suggest in purchasing a sub and separate amp. It will make your music sound so much better IMO.
As for a double DIN unit, do you want a touchscreen or are you ok w/ a regular double DIN w/ a volume knob?
If non touchscreen this looks decent, but it still has the USB and aux connections in the front.
https://www.amazon.com/Pioneer-FH-S...510375972&sr=1-16&keywords=pioneer+double+din
If touchscreen, I purchased this for my wife's Sequoia. You can actually turn the screen on/off but still have the radio/cd/ipod/phone connected and still playing music.
https://www.amazon.com/Pioneer-AVH-...=merchant-items&ie=UTF8&qid=1510375290&sr=1-5
Also forgot to mention that w/ the touchscreen unit, it has 6 RCA 4volt preouts. When it's time for you to connect an aftermarket amplifier and speakers, you want to have at least a minimum of 4volts to the RCA preouts to have quality sound. But also that depends on how you treat the doors of your vehicle too. But that's a whole different monster and a lot more money involved.
