Although I have gone over largely to contact printing large and ultra-large format negatives, I got an Analyser Pro when I was still doing enlarging. It is a tremendous tool, and you will have to pry it from my cold dead hands. I would have gotten a StopClock Pro with the analyzer add-on, but even 2 1/2 years ago, the dollar was already weak enough against the Pound that I couldn't justify the extra price. You won't go wrong with either, but if you are doing volume printing of images, I would recommend the StopClock so that you can program the burn/dodge sequences. That makes it really easy to make a consistent, repeatable image.