They're definitely worth it, with a very lush and airy sound and quite a wide soundstage. Not much bass compared to IEM's, but there's still great quality bass.
Earbuds can sound fantastic and beat IEM's hand down when it comes to soundstage width and depth. You lose a lot of isolation and micro detail compared to IEM's, but I love the sense of openess that earbuds can bring. The two best models are Sennheiser MX985 (recently replaced the discontinued MX980) and Blox TM7. Both are very balanced with good bass, tasty mids and sweet and detailed mids and a very 3D-like soundstage. They both cost around $150, but the Blox can be difficult to find since Blox make them in small batches that sell out quick.
Yuin PK2 is a step down from these, but still a very good all round earbud. It might be better for rock and classical music than electronic music, though
Edited by Danneq - 12/13/12 at 2:15pm