The Kef M100s in blue are on sale at Newegg right now for $28. They are a steal at that price. You can safely ignore the low reviews there. I have a half dozen $100+ list IEMs, and they are definitely competitive in that range. Sound signature is similar to the PX here. Pretty neutral, not thumping bass but definitely present. As with all IEMs, a tight seal makes a huge impact on your sound quality, but if these fit your ears, you won't find a better bargain under $30.