Cell

I am new to the whole HU industry. I have never changed one out or had one changed out in any of my cars before. So I really have no idea what to look for.

What I want is a double din HU that is touch screen. I also want it to be able to have tons of functions such as nav, ipod, usb, mp3, dvd, etc etc. The thing that may limit this search down to a very few HU is that I want it capable of reading my car's info similar to the GTR.

I have also considered a carputer but the FM tuner on it usually sucks.

Does anyone know any good HU or can recommend one to me so I can look up reviews?

Thanks