Let me start by saying that I absolutely love the Captivate- it's my first Android phone- been using Symbian phones for 6 years and have had an ipod touch for all the apps. I'm used to good headphones- having owned upper level Sonys and Ultimate Ears. The set that comes with Captivate is fairly mid grade- not awful, but not great either. I've been looking at aftermarket headsets with microphone and there are very few models advertised as compatible with Android phones, but tons of choices for iPhone. I see that many posters here own(ed) iPhones. Do the iPhone headset with microphone work with Captivate as expected? Are there possibly mic sensitivity issues, or some other things I should look out for? Looking to get a set in the $70-$120 range so that I can enjoy my mostly lossless music library. Also, I tried copying flac files to the Captivate through Kies and it refused saying incompatible file type. But, I saw somewhere in the published specs that flac is supported. Is it true or do I need some special player plugin or app?