iPHONE Control DD Unit?

Bidness91

Hello all.. I am looking for some advice on a double din unit. I just picked up my car almost 2 weeks ago and am wanting to put a screen radio in it. I have been going back and forth with spending 600$+ on a dvd w/ navigation vs 300$ish for just the DVD/CD unit.

Then I found the whole "iphone app" control thing that pioneer is offering where you can just have your google maps live feeding to your player. Why would anyone spend the extra $300 not to do this? I digress but am now in a pickle.

I have searched and searched and have come down to a few options but still need feedback. I am looking for:

-perferrably the 7" but not a must
- have app control so I can run navigation off it through my phone

And thats it. Just mainly the app control is what I want so I can save some $$$. All I have come up with is the Pioneer AVHX5500BHS, the Appradio, and just recently read that one of the Kenwood DDX370 has app control but I dont know if the GPS interface is the same as what I am looking at with the Pioneer's.

I have read nothing but mixed reviews on the app radio, but maybe some of you audio fanatics can give me some options. Thanks