For me, the Sennheiser CX 6.00 earbuds work quite well and sound just as good to me as anything else I've tried, wired or wireless; but, my hearing is not the best in some ranges so I'm probably not the best person to ask about nuances of sound quality.
As for battery life, they haven't run out of power on me, yet, but I don't think I've used them for more than 2-3 hours at a time, so far.
