I use Prophoto, myself. I find that I capture a lot more of what I want that way. When I submit to agencies, what I get back seems much better because I had so much more to work with from the start, no matter what colorspace they work in.

I used to kill myself trying to capture images perfectly at the moment of capture when I was a youngin. But the day I heard about how much PP Ansel Adams spent time on, and about how many thousands of images he would not allow the public to view because he could not get them right (by his definition), I felt like I was finally free. I finally relaxed and allowed that there was no 100 percent in any of this. I enjoy my images so much more now. And the time I spend on PP make me feel like the image is even more mine,since I am not simply relying on the camera manufacturers interpretation of the scene.