Thanks for the replies all. I decided to purchase LR. As I am now a contributor to a stock agency and will be shooting some reasonably high res digital (nikon800E) on my trips it looks like I'll need something that is more organized. When all i was producing was 10 images a year PS was more than sufficient. Now there will be vastly more images.
With scanned images though, do you first run them through LR for basic corrections like sharpness and levels, and save PS for layers and clean up?