I'm having trouble finding a GOOD bluetooth headphone thread on these forums. Even googling things the "top 10" lists I've found are mostly from 2007-2008. Basically I want a set of headphones that are Small - I go mountain biking and wear a helmet and sunglasses.. Strong - ..mountain biking.. Behind the neck - ..helmet.. Quality (sound) - I'm not really an audiophile but I know crap when I hear it.. Stereo Able to take phone calls (and not have to yell) Going to last 6+ hours on a single charge. Cost isn't really an issue. I don't mind paying a premium for quality if quality exists. Extra features like sweat/water resistance are a plus, but not really a dealbreaker. I've been most interested in these two: JayBird JB-200 Bluetooth Headphones : Bluetooth Stereo Headphones : Bluetooth Stereo Headset Headphones : iPhone Bluetooth Headphones : iPod Bluetooth Headphones : Jaybirdgear.com Sennheiser MM100 Sennheiser Worldwide - MM 100 So please, if anyone has any experiences with these headphones, share! I'm also wide open to suggestions for other 'phones I might not have looked at yet. Thanks!