Does anyone have any experience with apt-x? It's supposed to give you CD sound quality via stereo bluetooth(A2DP). I'm wondering if the quality is that much better over standard stereo bluetooth. I'm looking at getting these with the uSport Bluetooth adaptor for apt-x: (click 'next' after you click the link) Bluetooth Headphones : Bluetooth Stereo Headphones : Bluetooth Stereo Headset Headphones : iPhone Bluetooth Headphones : iPod Bluetooth Headphones : Jaybirdgear.com The evo needs the adaptor to add apt-x, apparently. I can't find any documentation stating that the evo has apt-x built in. anyone?