I cast my vote for the Etymotic ER6. My most desired is definately either the ER4 or ER6. Very high-end and great isolation with those tri-flange tips.
Too bad they're WAAY out of my current price range. The two listed in my price range are the Skullcandys and JVCs. I actually have one of each(marshmallows and ink'd)
The 'Modas have outstanding overall sound quality, very detailed and dynamic. The bass is powerful and precise. The overall sound is is only slightly colored and I feel the midrange needs more detail and dynamics but, for the cost, they are my current favorites...as long as I use the large Sony sleeves I have from a set of buds included with the NWZ-800 series DAPs. Those sleeves seem to be just soft enough in the walls to provide a sufficient seal without the buds being too tight. The 'Modas tend to migrate to a good seal without the need to manually press them in.
If you can manage $53, you can get a set of Harman Kardon EP730's from Buy.com, which are either made by Etymotic or just use their technology, I'm not sure yet. They do incorporate the Etymotic tech, though, it's right there on the box. I'd guess they are based on the ER6's.
If you can manage $57, you can get a set of Ultimate Ears Super fi 3's also from Buy.com, which are supposed to be outstanding. From my poll in this forum, they are ranked among the most popular.