Trying to decide between these two for use in my car aux input. I would be using the line out from the iPod 5th gen. I'm assuming I would need to use the headphone out from the Amp3. Is there a great deal of difference in SQ between these 2 in this scenario? I'm concerned about trying to...

I'm trying to figure out the best portable device to use as an aux source in a relatively good car stereo system (2000 USD installed). I've been considering a ipod 5th gen and using the line out. Will the line out from a unit that has one sound better than any unit's headphone out. Will...