I tried Lightroom a few times when they came out with the beta versions and although it is pretty easy to use, I prefer Phase One/ Capture 1 Pro 5 for my raw conversion and the PS CS2 for tweaking the conversion. I am about to upgrade to CS5. I do not however shoot 10k images in a session... more like 700-1,800 and so I do not worry too much about speed. I really like the quality my images end up with with C1 Pro 5.