Puunda,
I've heard the Amatis many times and I own the Guarneris. I believe FrankC is right on the money. Sonus Fabers are capable of wonderful midrange. IMHO, borrow a really good tube preamp and amp and perhaps a different source and report back. I realy don't think Thiel will get you in the direction you are asking for and I'd look at the electronics before the room. Also, Cardas Golden Cross is not the right cable. If you want to try a Cardas cable, try the golden reference - it is much better. But, you may not need the cardas as a tone conditioner with a good amp and preamp, which the Amatis can really make good use of.
I've heard the Amatis many times and I own the Guarneris. I believe FrankC is right on the money. Sonus Fabers are capable of wonderful midrange. IMHO, borrow a really good tube preamp and amp and perhaps a different source and report back. I realy don't think Thiel will get you in the direction you are asking for and I'd look at the electronics before the room. Also, Cardas Golden Cross is not the right cable. If you want to try a Cardas cable, try the golden reference - it is much better. But, you may not need the cardas as a tone conditioner with a good amp and preamp, which the Amatis can really make good use of.