I've ordered a pair of these
specialfins.com which I want to put on a pair of Fireblade footpockets I bought from here
Παρελκόμενα Πτερυγίων --- diveshop.gr
Expensive but the pockets are supposed to be the best currently. Lightest weight but still with good power transfer. Blades are supposed to be nearly indestructable with the reactivness of carbon.
The blades have been around a while and there are reveiws of them on this forum. Twice they've been tested in fin lineups, one of these times the reveiw was by Sven and the other by a group of divers also well known on this forum.