I know this question has been asked before and have been searching around, but I have not seen a definitive answer. I am buying these as a gift for some of my friends (non-audiophiles) none of which have (or probably will have) an external amp. They are also mostly listening to music at 128k (but styles all over the place, rock, dance, hip-hop, etc.). Are the RE0's going to make a difference in sound quality over the the regular buds without and amp? And just as importantly will they also be as loud? I know they have a high imp rating (64), will they still sound good? I know they are well regarded here on this forum. I am assuming they will be playing them through ipods/iphones for the most part. If I didn't buy these for them and they went out to buy something for themselves, they would probably end up buying bose earphones (but I don't want to buy those and they are out of my price range). The only other options I have been thinking about are the soundmagic pl50's or the meelec cw31's. Any help is greatly appreciated.