Corbins are nice but very heavy, they use fiberglass. Try Sergent, they use your stock pan and have just as nice of a finish as Corbin.

 

There is a great guy that does lots of work for the local riders here. He builds the seats to your size and has a one day turnaround typically. They still look like the stock seat but they are much more comfy. The best part is it will only cost you $50.

http://greatdaytoride.com