I've sold the Stereo 50 and the speakers. I've heard the Stereo 50 on many speakers and trust me, the iFi speakers don't stand up against a pair of Omega. If not Omega, I'd strongly suggest going a different route for the speakers.
Keep in mind with the Stereo 50 you will need to push the volume some unless you have some efficient speakers. The 25 watts seems less powerful than that, but it doesn't take away from the sweet music it creates with the right speakers.