Need help finding good quality earphones

[Sagacious Koreo]

I used the Bose in-ear headphones for the longest time, but they appeared to have just shorted out yesterday. So instead of getting them repaired I'm thinking I want to buy a new pair. I know there's a lot better out there so I've been looking around. So far these peak my interest:

Klipsch IMAGE S4 In-Ear Bass Noise-Isolating
Shure SE530 Sound Isolating Earphones
Etymotic Research ER-45/ER-4P Earphones
Jays q-Jays Earphones

I'm looking to spend no more than maybe $250-$300 on them. The lesser the better, but I still want the best quality possible. I'm definitely critical of audio. I want good crisp highs and a strong, but not overbearing bass. At the same time, I'd like good sound isolation/noise reduction. Can any of you guys spit some knowledge my way?