@davevf
I am with you on this one. I have Guarneri Memento's and I absolutely love them. The only speakers that have made me want to possibly change (not upgrade, just change) were the Il Cremonese that I recently heard in Denver when I was there.
The Guarneri's just do a good job as long as you pay attention to placing where they need to be and optimizing the room around them. Pair them with some proper hi-fi source and amplification and you just sit back and enjoy the sweet music