Just bought a Creative WP-350 and I like it. Works fine with my rockboxed clip+ (+ the Sennheiser DT 300 Audio BT-Dongle). The WP-350 (as well as the WP-300 which lacks headset function) supports apt-x (http://en.wikipedia.org/wiki/Apt-X) which provides better audio quality when paired with an apt-x-capable source (like the a.m. sennheiser-transmitter).
I also use it with my xperia ray - smartphone and Poweramp-app, which means no x-apt, but you can improve the sound-quality using the equalizer.
Don't expect the same sound quality as from a good wired portable headphone but it's still enjoyable. Practicability on the other hand is great: no wires at all, stop/play/skip music and do/receive phonecalls with buttons on the headphone itself.
Edited by ec_na_ton - 4/15/12 at 1:39am