playlists being better is subjective. every car stereo that has an AUX jack supports both zune and ipod. and, since i have a kenwood deck that supports ipod control, i can tell you the sound quality between the zuneHD and itouch is noticeable. the zuneHD sounds better. i was surprised to find that my old gen1 nano sounded better than my daughters itouch tho, i thought the newer itouch sounded great, and would outperform the nano. mebbe its just my nano tho. i like the ipods and the zuneHD, but if i had to choose just one it would be the zuneHD. zunepass pwns too. oh, so does wireless sync. oh, dont forget hdmi 720p out for my tv.
what accessories are really necessary for any mp3 player? for my kids ipods and mine, all i can think of is maybe an alarm clock thingie so they can charge and listen to it at the same time. i cant really think of any "must have" accessories beyond a docking station, and the one i have for the zune integrates with the tv and stereo, has a remote and turns into a player i can sit on my couch and enjoy from afar. im sure theres a dock like that for the itouch, i just havent had any reason to get one.