I am going to agree with @
Iride01 - in that, for my rides of 30 miles or less most any saddle is OK. But, .... given increasing age and some moderate weight loss over 2 years, I have decided that some of the 'marginal' saddles on my road bikes need replacement. So trying the SA R2 and chose a new but blemished one for under $100. Again, I like both versions of X series - different rails. The R2 has a new frame that can take a leather cover if the rubber version needs replacing.
The other leather saddle with a cut-out that i like is from Gyes in Taiwan.
Comparing the two cutouts - SA X series to the Gyes - the length is 19cm to 11cm (Gyes). The Gyes is also a stiffer leather.
Will soon be trying out a recovered leather saddle with a custom (long) cutout. From a fellow BF member.