I use these: Sony DRBT50 Bluetooth Headset [1]. I bought them for $115, however some dramatic dynamic re-pricing seems to have occurred recently [2]. Also, I'm

I use these: Sony DRBT50 Bluetooth Headset [1]. I bought them for $115, however some dramatic dynamic re-pricing seems to have occurred recently [2]. Also, I'm a longtime fan of these Sony MDRV600 [3] which sadly appear to have been discontinued. Also, this Electronic Archicture album [4] is one my regular ambient listens when trying to focus. 1: http://www.amazon.com/Sony-DRBT50-Stereo-Bluetooth-Headset/dp/B000PCCLPU http://www.amazon.com/Sony-DRBT50-Stereo-Bluetooth-Headset/d... 2: http://camelcamelcamel.com/Sony-DRBT50-Stereo-Bluetooth-Headset/product/B000PCCLPU http://camelcamelcamel.com/Sony-DRBT50-Stereo-Bluetooth-Head... 3: http://www.amazon.com/Sony-Studio-Monitor-MDR-V600-Headphone/dp/B00001W0DI http://www.amazon.com/Sony-Studio-Monitor-MDR-V600-Headphone... 4: http://www.amazon.com/Electronic-Architecture-2-Ambient-Edition/dp/B00593AFC6 http://www.amazon.com/Electronic-Architecture-2-Ambient-Edit...