Thanks, I'll take the gamble and buy the Pioneer SMA4. I'll let you know if I got it working...
Edit:
http://answers.microsoft.com/en-us/windows/wiki/windows8_1-pictures/use-non-certified-play-to-devices-in-windows-81/660c16a5-33e8-4a1a-9466-6fa2bfe07956
Probably I don't have to edit the...
Can I connect the Surface 2 from an app with 'Charms' --> 'Devices' --> 'Play' to a Pioneer SMA4? The Pioneer supports DLNA, Airplay, HTC connect and Wireless Direct.
I think it should work with DLNA, but I want to know for sure before I buy one...