I agree on the Big Bens; good but not great. Not overly sharp but forgiving though I need some extra touch-ups. But there are several blades put out by Lord that I prefer over these.
YMMV a lot from mine. Sharks have been the only Lord blades I tried that didn't work for me at all, Derby's are among the worst I encountered and the Astra's, well, the Czechoslovakian ones (back in the days) were really nice but I gave all mine away after trying a dozen or so of the russian ones. Lots of pulling and scraping going on with all 3 of them so from the blades you named I wouldn't hesitate to stick with Big Bens.
Originally Posted by traps38
I must to the barber's, monsieur, for methinks I am marvellous hairy about the face