I've had good luck with Gillette 7 o'clock blacks in my Superspeeds, and Astra SP's aren't bad either. I haven't tried much beyond those two, but that's my 2¢.
Well the threadstarter didn't specify current production or vintage so here's mine: Personna 74, Gillette Super Stainless the Spoiler and Schick Platinum Plus.
Current production : Shark SC, Blue Birds and Asco blades.