Peak Consult Zoltan vs Sonus faber Amati Annivers

Sorry, saw that the question was about Amati... In my opinion the Zoltan is the better speaker, but it is much more expensive, at least in Europe.

have you heard them side by side?

IMO Peaks are a good speakers, if slightly overpriced. A good friend of mine owned The Empress and now switched to Emperor. And since they use same driver technology as Sonus Fabers (top of the range Scan Speak tweeter and Scanning's Audio Technology midrange) they sound more alike than not. I would put my money on the SF any time though.