First off - nice bike.
In the past, I've always had the harder Corbin's and always been really happy with them on a variety of bikes. I've always managed to find them as newer used seats for around $200-$300. I think I've always had the ones called the dual canyon, but it seems there are some differences in finish between them. The one I just put on has some slight ribs in it and is really plush compared to all the others I've had. The one I had on just before it was harder and completely smooth, but I was still able to do ride 12hr days over and over without issue. See pics below - 1st is the old seat, and 2nd is the new seat.
I've only put on about 2k on the new seat and it's surprisingly more comfy than I expected and still really good for moving around when cornering. It does feel a touch wider at the inner thigh, so it changes ability to flat foot the ground vs the older seat which was more rounded near the lower front. My only dislike about these seats is that with constant sliding around on the seat with abrasive textile, the stitching near the crotch of the seat tends to fray after around 100k of aggressive use. If that area could be smooth with no stitching then problem solved.