Help me find WARM speakers a la Sonus Faber

A local dealer recommended Vienna Acoustics Beethoven Grand

Assuming this is the Concert Grand, it appears the dealer was not considering your MC275. If you look at measurements in the Stereophile Review, it indicates the speaker is not suited for a tube amp, even suggesting a result of increased treble, which would seem to work against what you are looking for. Also, measured sensitivity was nearly 4db lower than specified. This also makes me question this comment,

If he cannot and is truly being a good guy by recommending a speaker that you would have to buy from a competitor dealer, then I applaud him and would take his advice. He has given you a good suggestion.

So, are you just looking for this dream speaker, and if it doesn't work well with the MC275, you're fine to replace it with a solid state amp?

or

Are you looking for a dream speaker to use with the MC275?

The 2nd will definitely have a more limited selection. IMHO, if you want to use the MC275, I would make sure the speaker is tube amp friendly before spending 10 grand on one.

Elegal, that's great! If you have heard the Olympica/MC275 combo and it works well, then I agree with Chayro, find a way to just make it happen. It doesn't sound like you will ever stop thinking about or wanting them. Good Luck!!