A test comparing the use of graduated neutral density filter and photo shop tweaking against Photomatix Pro HDR software. I'm still using the trial version, so there is a watermark on the HDR stuff.
This is the second scene I chose for a test. I was up before dawn to get to this spot for the light. Again, it's a raw photo made with the aid of a graduated neutral density filter and tweaked slightly in PhotoShop: http://images107.fotki.com/v527/filenbJc/9ec6e/5/785/7533849/_RAY4228.jpg I did a shot something like this last time I was in the valley, but I didn't get there when the light was good, so I was looking forward to redoing it. It pretty well matches what I had previsualized for the shot.