Cheaper MP3 Pioneer Car Stereo Recommendation

I am looking for a Stereo for my car. I am betwenn two possibilities: Pioneer DEH-4800MP or Pioneer DEH-39000MP. Which recommendation between boths?

Depends what features you are after; iPod connectivity, pre-amps required etc.

Both the models you mention look on paper to be very similar. What made you choose these particular models?

I don't have any experience of those Pioneer models, but I have those that I have had have been good, but personally I prefer Alpine units.