I am wanting the Parrot hands free car software for my phone when I pass my test. I have an iPhone4 and am wondering which is best suited to that phone?

Also, I've seen the Parrot kit that comes with a small LCD Screen to sync album art work and play music through your car speakers, straight from your phone. Is it worth spending the extra money to get that package? or are the other, more basic ones just as good ?

xxx