I'm pretty well stocked with the Israeli Red Personnas right now and I like them, but the Super Iridiums are a better blade for me. Now, whether they're worth twice as much as the Reds is another matter, but blades aren't all that big of a daily expense, so I'll pick up some S.I.s soon.

There's one other blade that I try to keep around, and that's the Astra Platinums. IMO, they aren't quite as sharp as the S.I. or Red but they are far smoother than either (although the SI is close). That's something nice to have when I get a little sunburned or have some other skin irritation.