Forgot to include 1 other gear impression....
Monster Beats Studio: At one point during the day I found myself in a room with these legendary headphones.
So I took out my own MP3 player and checked 'em out on it with some music that I know really well. I'll be the first to admit that I'd love to bash the Beats if I could, but these didn't sound terrible. They were better than what I was expecting! Ok they weren't exactly "good" per se, and I can think of cheaper headphones that sound better (like the Koss KSC75), but they weren't a total piece of sonic crap either. I'd put them on the same level as the Sennheiser HD419 that I own, which retails for $60, so I guess the Beats Studio are comparable to $60 headphones?