Koss SparkPlug Earbuds (silver)

Pros: Crazy sound isolation, comfortable, incredible bass

Cons: Sound may seem a bit muffled

Summary: I just got a pair of these cuz I got sick of sony isolating earbuds, 2 pairs broke down on me. So far these are REALLY good. These earbuds are definitely for bass lovers, it is unbelievable. The sound isolation is off the comparisson, you can't hear anything.
The only "but" this is that sound seems kinda muffled, but later on you get used to that and I actually like it a lot because you can listen to your player for hours without breaks without being exhausted.
But for the price these are definitely worth a try.