Screen wise... I would rank them in this order for clarity.
Sony>P3>S9>>>>>>iTouch.
I absolutely abhor the iTouch interface. I'm the opposite. I jumped on hating iPod starting from around gen 3 nanos, when they just started being retarded design wise. Improvements? Not useful that I can see. Sound? I really didn't mind that much back in the day, but current gen ipods still don't seem to cut it. (I tried loading the same song on my S9 vs a newer iPod, same headphones, the iPod still sounded not quite right)
Headphones, make a huge difference. But iPods look retarded and silly with anything in them other than the stock headphones. But yes, sound is better with other headphones, aesthetics look down, but the sound is still ear cancer.
Playlists are the only damn thing that iPods are good at. Even then, it's not a big enough pro for it to be ranked high on the "awesome usage" scale.