After many years of listening to speakers I purchased the Vienna Mozart’s. (Space constraints and $ prevented my buying the Mahlers) I had listened to Sonus Faber, Audio Physic, B&W, to name a few all around the same price point. The Vienna’s sounded right. With others speakers I always felt "something" was missing; bass, openness, tone etc. I have listened to them for nearly two years, often for hours at a time and never found them fatiguing. I added their center speaker and Hayden's to my HT.
The fact I rarely see them for sale second hand indicates owners would be very happy with them.
If the Vienna Mozart’s have a weakness, it is in the bass. I added a REL subwoofer to fill out the bottom end. A local dealer believes this combination is better than the Beethoven’s.
I believe they are very good speakers at a very competitve price point. I believe they work well with all amps but always try and listen to them at home with your equipment.