I'm in the market for a set of earphones / earbuds / IEMs for primary N900 usage and so far two have caught my eye: Etymotic ER-4P and Audio-Technica’s ATH-CK7ASV I'm practically sold on the CK7 low-profile design. But how comfortable are the in-ear pads? My ATH-M50 cans are solid performers and this is a contributing factor albeit a different sound stage. The protruding ER-4P design leaves something to be desired, although the isolation seal looks garunteed, which is a fairly high priority. The in-ear pad options look comfortable too. Bass is important however not overly critical... there's other sources for proper bass if necessary. Plus from what I've read bass response is directly related to in-ear seal and this is common across many / all IEMs. Any N900 experience out there with these or other comparable models in a similar price range?