When it comes to headphones I use the hp 150's (on puter right now)
For the mp3 I use the shure e3c's...they do nothing but "SING"
I have used them on the puter and they do a better job than the 150's but for now I just keep them on the mp3 player...
150's just don't give you the "strength" that the e3c's do...
on another note...
I recently broke my e3c's (stepped on them...)sent them in to be fixed and they told me it would take about a week to fix...well based on past experience with this type of thing I went ahead and bought a pair of e2c's to check them out while my other ones were down...they were somewhat of a disappointment , have a relatively good sound, but very uncomfortable...nothing like the e3c's... anyway to make a long story short..ecost is going to let me return them and get another pair of e3c's...
shure sent me a NEW pair of cans (e3c's) in about 10 days...
can't say enough about the e3c's...was mowing on riding lawn mower last night...felt more vibration than sound with them plugged in...these things put you in a different environment....and NO I don't work for shure, lol