Corbin seats are notoriously hard. Also, they're more of a one-size-fits-all replacement seat than a true custom-fit saddle. I tried one on my LT and didn't like it at all. Plus I've heard a lot of bad things about their customer service. That said, I've heard of guys who are happy with their seats. Guess I just don't have a Corbin butt.
Rick has a great reputation for his saddles, but a somewhat haphazard reputation for customer service and slow turn around times. That said, those who own his seats rave about them. A ride-in appointment probably helps quite a bit here.
Bill (Rocky) Mayer also has a great reputation. I have heard of a couple of unsatisfied customers, but I have heard of dozens of very happy customers. His design doesn't have any top surface seams, which gives one less area of irritation on long rides as well as a slight advantage in wet weather. Again, if you can do a ride-in, that's the best option.
I went with Bill (Rocky) Mayer on my LT. The next day I did 750-miles in about 12 hours, and the exact same 750-mile return trip the day after that. The best compliment I can give is that I just never thought about my seat while riding. I've been happy with it on countless 1,000-1,500 mile days over the next 60K miles.
In fact, I was so impressed that my new GT went to Rocky the day I picked it up from the dealer, and 33K miles later (including many 1,000-1,500 mile days) I have zero issues with the seat. I can easily ride a full tank of fuel, fill up in under 5 minutes, then get back on and do it again, pretty much for as long as I want.
I suppose that's all you can really ask for in a custom saddle.
