Brand new on site,finally approved for forum. I am just about to pull the trigger on a 2160. I've read some of the threads on the blue tooth add on they offer, some people not to pleased with it.Would an after market audio engine Bluetooth DAC, for example be a better DAC than outlaw audio's. Also, is a USB connection for the Bluetooth DAC a better connection than optical? Next : there are 2 USB ports on the rear of unit,from reading owners manual they seem to offer a direct connect to an I phone, which i believe would allow the outlaws DAC (I assume is better than my I phone)to stream my music through. Any help would be great. Thanks RobertTN