I like the Fizik Arione but it's an expensive saddle. When mine broke and I decided I couldn't afford to replace it a friend suggested Fabric. They make their saddles in a differing widths and profiles (flat, shallow and radius) to suit different riding styles. They also do four different rails on them. I went for a Line Elite Shallow and I've found it to be very good. So I got a Scoop Elite Shallow for the other bike - also good but I think I prefer the Line.

My bike came with a bottom end Selle San Marco saddle and it has to be the worst saddle I've ever sat upon.