Sorry about the last mail I had posted which mentioned the retail price.
Basically, personal I like DR's tourbillon more than GP's ( which just show the picture on the fist page of this fourm. Even for the perpetual calander model DR is using the GP's 3100 caliber but the our looking and the design, the DR still is the most beautiful one for me.
Actually,if I am not wrong that so far the Swiss watch using the own caliber are Znith, GP, PP and JLC, Breguet is using the same group's caliber. I do not think the caliber is the most importment issue for the watch because the caliber development is to mature in watch industry now.
cheers
eddie