I know headphones are more of a religious discussion but I wanted to share.
I own a couple pair of good headphones and headphone amps at home, including my favorite the AKG k701's. Well I wanted a pair for the Droid since I travel a lot. I did NOT want the Bose as I feel they are way overpriced for you get and the quality in the end is subpar. I'm also not a big fan of in ear phones. I settled on over the ear or on ear style. Over the ear, though, seemed a little too large for my style and unfortunately a lot of the on ear phones were smallish. I also wanted closed back because I didn't want everyone to hear my music. Let's add in that I wanted solid bass since I fly a lot and it gets drowned out. So basically a DJ style headphone.
After a lot of research I decided on the Audio-Technica ATH-ES7. I have to say that I'm thoroughly happy. It has everything I wanted and more. Not to mention they look really good, not cheap. They sound awesome (after a good break in period) and look good with the Droid.
If you're looking for new phones give them a look. Oh! Be sure to be very careful as they are one of the most copied headphones out there. There's tons of fakes. There's a good thread at Head-Fi on how to spot the fakes and also a list vendors that are confirmed to sell the real ones.
Anyway, hope this info is helpful to anyone looking. Cheers.