With summer coming on I am not sure my HD280s are going to work outside very well. Any preferences between these two or similar canal phones? I like classical and rock and some folk music - no real preferences. I think I like brighter headphones as opposed to laid back phones. But bass is important, too. **Source is an IRiver 320. It has some equalizing capabilities bass, treble, pinpointed bass (40 or 60 or 80 or 100 Hz) and a lot of preset settings.** USD prices: Etymotic ER-4P $239 at headroom Westone UM2 $275 on ebay I did some searching. Anything to add to the quotes below? Catscratch back on 3-19-05: "Maybe you can try the UM2. It'll be a bit warmer with a bit more bass, though less detail and instrument separation. Not better than the ER-4, but a different sound." and on 3-21-05 "If you want an unamped system, go for the ER-4P. It will have some problems - it's treble is a bit too bright and sparkly and it has some upper midrange glare that I really don't like - but on the whole it's the best unamped portable for acoustic music. The e5c has a tonal balance that's more suited to heavier, electronic or electronically amplified music like rock, while the UM2 is somewhere in between the ER-4P and the e5c." Benjamind 3-25-05: "You should save up and get Westone UM2, which go for $329. These are majestic sounding canalphones. In my canalphone experience, the Shure and Etymotics can't touch the Westone UM2." and on 3-23-05 "For me, the UM2 came the closest to the audiophile quality sound while maintaining complete and total musicality, with a rich balanced sound, without being too bright or too warm. The ER-4P and ER-6i and E5c had some sort of deficiency, to my ears the UM2s had the most complete sound and top-notch frequency response. From the lowest lows, to the highest highs. The very top-edge of the high-end does roll-off but it wasn't noticeable to me. Percussion just never sounded so good! The ER4P and 6i suffered from a lack of bass depth and richness and the sound was sort of cold and sterile in comparison to the UM2s, and I was getting a decent seal with the Etymotics. The Etymotics are still top-notch earphones, but the UM2s will chew them and spit them out. The E5c had noticeably rolled-off high end, and also suffered from an emphasised midrange which seemed to come out too much. The UM2 chews the E5c and spits it out too. UM2 simply has better midrange and treble than E5c because it's more balanced, there is no emphasis at all that I detected with my ears and I ran all sorts of instrument sample tests. Nothing was exaggerated or recessed, it was almost flawless. The bass was as good as it gets with canalphones, at least the ones I tested." Steel102 on 3-21-05 "...For classical music, you should be fine with either the er-4p, or the er-4s(if you want to invest in an amp..). Ety's excel at classical music. chances are you won't like the e5's because of the lack of highs. the um2's also exhibit this to some extent." Dotyman on 3-22-05 "btw, I demo'd the Etys against the E3Cs, E5s and the UM2s before buying and the Etys are much better suited to audiophile sound. The Shures and the Westones (original maker of the Shures) have intentionally rolled-off highs for professional musician applications."