XC and marathon racing saddles - I am looking to replace the Scott branded saddle on my spark 40. I would like to save some weight and also something which is narrower.

The thing with a saddle is how do you know unless you put it on your bike and ride for a few hours?

I am a lightweight and find the scott saddle gets in the way a bit when I move forward and back. On my road bike my saddle narrow with almost no padding and I find this is comfortable.