Best double din radio? Options

[cjpost]

I am looking to upgrade my stereo system and I plan on buying a double din touch screen head unit as well as two new sets of speakers (front and back).

Subwoofer capability is necessary, and I would like it to be relatively loud.

I have the 1994 gt coupe with no 8 speaker option.

I have been looking around and it seems like none of these radios are compatible with the iphone 5s without a separate cable.

At the moment the kenwood ddx470 seems like the best option with my budget (I would rather not spend more than $350 if possible

Any advice on what speakers to buy is also greatly appreciated, I can spend up to $200 for the set of four and am looking for good sound quality as well as loudness.
I need speakers that will not blow out if I am blasting the music.

Also, I have been looking around and the highest I have seen is a 22W preamp output for the speakers. does this mean I should invest in an amp as well?
I am not sure as I previously had a 99 vert with the 8 speaker set up and a single din head unit.

Any suggestions are welcome and appreciated, thank you.

[cax_11]

I have the pioneer AVH-X4500bt, iphone ready, but have to buy an hdmi cable and a lightning to hdmi adapter, then you can pretty much take control of the phone through the touch screen, there are also apps, like Car browser that allows you to use the radio like a tablet and browse. Pretty neat