I’m in the middle of new saddle choice too – though my criteria includes a saddle that can support a long day ride.
you’re likely ending up with a perch that weights between 200g and 260g. Two of the biggest contributors to weight in a saddle are the padding, and the rails. Padding is actually not that big a contributor to comfort, as shape and good chamois in your shorts has much more to do with it. Shape wise, many manufacturers now give you options for a shape that suits your flexibility and riding style – like Fizik, SDG, Specialized and Fabric. Switching to Ti rails, from CroMo will drop 20g ish, switching to carbon will drop a lot more. However, I still have concerns over how much punishment carbon rails can offer. Ti rails will likely bend in a crash or bad landing, where carbon may snap.
I’m a bit off Specialized these days, after the Cafe Roubaix debacle, last year, but they do make fantastic contact points. The Venge, would probably suit your requirements, or the Phenom, if you’ve more a racey style.
Fizik offer the Aliante for more relaxed, upright, riding and the aliante and then the Tundra getting more racey, with a flatter profile.
The SDG Bell Air 2.0 looks like a good comfy option, with the duster offering a little more trimming down and more suitable for speed and power delivery.
Fabric look like a great option. Everyone raves about the the Charge Spoon and Scoop, and now you’ve more customisable choices from Frabric. The Scoop, with ti rails, is a fantastically comfy saddle with 3 shape options: Flat, for low race positions, Radius, for upright comfort and Shallow, somewhere in between. For comparison, the Charge Spoon is a Radius shape.
Hope that helps.