Right now, Fizik Arione. Have test-ridden (on a bike I was test riding) Selle Italia SLR and liked it too.

I've found that I need a saddle that is absolutely dead flat from tip to tail, but that is convex (turns downward) from center to edge. Additionally I like saddles that are firm and not too wide, and have a nice narrow, longish nose (I bought a cheap Selle San Marco -- SKN -- which basically fit that profile and was pretty comfortable too). I like the length of the Arione, and I like the transition from the nose to the back, it's very gradual and smooth so I don't feel like I'm "running into" a sudden flare in the back (as I sometimes did with the SKN).

Oh -- and I've had bad luck with cutouts. Surprisingly saddles without cutouts that meet the above criteria don't create undue pressure for me.