It's a pleasure to be a part of such an educated, interesting, and great group of people. I've been lurking for a while, but am so impressed with everyone's expertise, I thought I'd ask questions and interact, for once.
I'm a high-school science teacher, also a soul, jazz, blues, and classic rock singer and musician. (I'm telling you to give a better picture of my background, technical knowledge, and preferences.) I've listened to some good low-end headphones, but I know what good sound sounds like, and I don't have it. My Bose On-Ears (presents) are nasty - muffled, boomy bass, ill-defined highs. Same story with my V-Moda Crossfades. I have some Sennheiser HD280s, but they hurt like the dickens and are just so... boring. Good for recording, though.
I don't have an inclination to amp headphones, just because I'm always moving around, from school to my desk to other rooms to outside. I know amps offer improvements, but I've always felt that the easier the headphone is to use, the more likely I will be to actually use it. I'm so darn busy anymore, I need the least complicated setup I can get.
I have about $400 to spend right now, and I've been saving for a good pair of headphones. I care mostly about sound quality and detail, but a little comfort wouldn't hurt. I've heard Grados, and love the sound, but I've heard that the DT-880s (32 ohm, of course, for unamped) are comfortable AND durable AND sound a bit Grado-ish. Good for long correcting sessions. I've also heard great things about the new HiFiMan HE-400, but was worried they wouldn't work unamped on my iPad or Galaxy S3. Oh, and then if I go for Grados, I like the idea of the better components in the 325, but I heard it's too harsh.
I'm so confused at this point! Opinions, come flooding in!