I've never been a fan of earbuds as, to me, they didn't fully reproduce the musical experience. That may have changed with the RumbleBuds from Atomic9. These earbuds include a subwoofer right inside each earbud! Before I put them in my ears, I loaded a bass-heavy song (Daft Punk's Derezzed from the TRON: Legacy soundtrack) and watched as the earbuds literally started to move across the table! Talk about good vibrations, and no batteries required!
When I put the earbuds on, I could tell these were different from regular earbuds. At $50, they should be and I was not disappointed. The subwoofers make a difference and really bring the music to life. Available in black or white exclusively from BestBuy.com, the RumbleBuds are marketed towards Nintendo, PSP and MP3 players but they work fine for the iPhone. While some other earbuds come with assorted sizers, these did not but they fit my ear just fine. There is no microphone or hold button so you'll have to use your phone for that but for listening to bass-heavy music, the RumbleBuds are an excellent choice.