GEAR,
You could update to the Pi3B or the newer Pi3B+ (which will be supported once the new software is released).
Either of these will give better processing speed, plus onboard WiFi (so you can ditch the separate dongle) and also support Bluetooth Audio Out.
You can change your existing licence over to the new Pi by sending a request containing your name plus the 12 figure ‘MAC’ addresses of the old and new Pi to ‘support@pilotaware.com.
Regards
Peter