Another vote for Specialized Saddles. I contacted a local rep, who brought out a variety of models for me to try (Ultralight, Eurolight, Trailmaster). I ultimately went with an Ultralight, and I love it! It is fit to my horse, and it fits me well too. It puts me in a great position and my bum doesn’t get nearly as sore as it did in the General Purpose english saddle I was riding in prior to the Specialized. I also use sheepskin covers whenever I do any riding out of the arena.
If you want to stick with your current saddle, I’d try out different pads and cushions. I’ve always used sheepskin cushions, but I recently tried a friend’s gel cushion on a ride and it was wonderful.