I'm looking at getting a new bluetooth adaptor and i'm looking on pricewatch.com. I see the cheapest ones are USB 1.1 and Bluetooth v1.1. the more expensive ones are USB 1.1 and BLuetooth 1.2, and the most expensive are USB 2.0 and Bluetooth 1.2. Does the version matter? bluetooth 1.2 is the newest according to bluetooth.org.