Thanks everyone for your advice!

I've just finished posting a tournament that I needed to process and organise around 5000 images. After looking at different software I settled on Lightroom because of how long it would have taken to learn enough of something different in a short time. I'm only using a subset of features at the moment but will definitely learn quite a few more shortly.

Incidentally, I also purchased a D600 for the high ISO handling. Very nice camera to use, and will do me for quite a few years

Will post up a bit of a comparison between the different products, and some photos when I have a chance