Just got the Corbin for the Niner myself. Quite a change from the stocker. Seams to put me up a bit higher and slightly back. My reach to the Ultra Lows seams more aggressive. The Girl likes the fact that she can now see where we are going due to the ultra padded passenger area. Should get some miles on it this weekend so I can let you all know how it is for extended travel. One thing for sure if you are concerned about wieght the corbin is not for you. Its a tank compared to the stock saddle.
I just wanted to quickly share, I'm at Starbucks right now and I clicked the Spoiler button to see what Async posted and then set the computer down to get my drink. Came back to see people looking over and laughing at a picture of a canister saying MONKEY BUTT!. It was awesome.
Get your bike properly sprung for your weight. Once that suspention is soaking up bumps as it should, the stock seat may not feel so bad. The other benifits are, no weight increase and a little better handling.