On-ear: Grado SR125's. they look like crap but sound great for just about any genre. In-ear: Westone UM2's. dual driver gives you better bass and treble than usual, good noise isolation.
Any thoughts on these? http://www.amazon.com/Audio-Technic...TF8&colid=2YXN1ZIKTRP60&coliid=I3M3P2DK1KE8GG
...those are rated pretty good at --> http://reviews.cnet.com/best-headphones/ I have these, incredible earbuds! --> http://reviews.cnet.com/headphones/klipsch-image-s4/4505-7877_7-33577358.html
I liked these. http://www.bowers-wilkins.com/Headphones/Headphones/P3/explore.html don't own them yet as i don't really use headphones all that much.
Monoprice headphones get solid reviews if you are on a budget. http://www.monoprice.com/products/subdepartment.asp?c_id=108&cp_id=10823