Greubel Forsey ←
24 Second Incline Tourbillon
Probably the best bargain the GF lineup, this is a SUPERWATCH in the mortal realm. The 24-second incline tourbillon is the invention from Invention Piece 3, and is the same tourbillon used in the GMT, Perpetual Calendar EOT, and even the Grand Sonnerie. 24 seconds is super speedy: very cool visually both from the top and through the side window.
This one is White Gold with a silvery-white dial and is complete with box and papers