I've heard them once. Nice speakers, obviously more potent down low than the SF GM's but I'd hunt down a pair of Strads though before I'd settle for the Amati's.
The Strads are even more majestic in their presentation and have a slightly more richer tone overall which can be very addicting in the right system. The comparison to the Amati vs Elipsa is sort of a darker lager vs a lighter beer.