The only bluetooth device I use with my droid 1 is a pair of headphones for listening to audiobooks and occasionally music, though I prefer a pair of dedicated wired phones for music. I did however do a lot of research and try a lot of different headphones before settling on them.
The phones I use are the Sennheiser PX210BT. They're quite comfortable for me, and I have a very large head, but I still have to stretch them a bit and they have a large range of adjustment so someone with a smaller head would still find them comfortable I'm sure. The build quality on them is far better than the pair of sony bluetooth headphones I had before them (which broke after a year). They have a metal band with a very durable plastic around it, which seems to flex with the metal very nicely. All the joints for folding them are also quite sturdy.
The sound quality is likewise significantly better than the sonys I used to use. It is in fact better than any other bluetooth headphones I've tried, but it's still far from perfect as is to be expected when the audio is being recompressed for transmission. The biggest issue I have with the audio from them however is not so much one of sound detail, which compared to any other bluetooth device I've used is exceptional, but in the area of high bass where they seem to lack a bit of volume compared to the rest of their sound range. The built in controls work quite well with the standard audio player, Mixzing, Ambling Audiobook Player, and Act One Video Player, though they don't work quite right with the youtube app (which I think is more the app's fault than the headphones). They produce more max volume than you could ever want, and have a broad and finely delineated volume range. They also come with a cord for wired connection, which does improve sound somewhat, but it's hardly a noticeable difference because as I said before their biggest problem is not so much one of clarity as the lack in the high bass range. Either way if you're not an audiophile I'm sure you'll find them quite pleasant to listen to music on.
Their battery life is exceptional. I use them for about 8 hours a day every day, and while I usually recharge them every night I have forgotten in the past and still made it through another 8 hour day without the batteries dieing on me.
The PX210BT model I bought is the baseline model. It's the cheapest because it doesn't have a microphone or noise cancellation. There is a model with noise cancellation (pxc310bt) a model with a microphone (MM400) and a model with both (MM450). Obviously the price goes up with more features. I can't personally speak for the noise cancellation or the microphone but all reviews I've seen have been positive for both features.
