Sorry guys, I gotta post back in here and say again how AMAZING these Monoprice 8320's are.
They started out good. Now that I've got over a week in them and have been able to listen to more variety I'm even more impressed by them. The only two things that I don't like are:
1. noisy cable
2. tricky seal - this is critical, and I guess I lucked out by getting some tips that happen to seal well
But considering how good these things sound, I would have no problem going out of my way to make custom earpiece molds just for using them on these.
The crispness combined with the low, rolling, round bass that I can physically feel on my eardrums brings a giddy smile to my face.
I used to have a $350 pair of Ultimate Ears SuperFi bass dual driver whatevers and they sounded like mud despite being broken in and getting good reviews. And they don't how a candle to these $15 MonoPrice ones which are crisp and refreshing at the same time as being full-bodied.
But... fit is *everything* with these headphones.
EDIT: Ahhhh... these things are so good!!!!