I don't mean to imply that you shouldn't ask the question, but I think the "which mill to buy" question is among the most frequently asked all-grain or equipment/sanitation forum questions, right up there with "infection?" in the beginner's forum, and "stainless or aluminum" questions in the equipment/sanitation forum. Search and you'll find a lot of these grain mill popularity threads.
More than 90% of the responses you'll get in this thread and will discover in other grain mill related threads will be people telling you what they use and that they are very satisfied. About 1% of the posts will be people telling you that they used to use a Corona mill, but found it unsatisfactory so they ended up buying one of the major grain mills. The remaining 9% of the comments will be unrelated banter, and posts with made-up statistics in them like mine. There will be a negligible number of posts where someone says they bought one major brand, didn't like it, and ended up buying some other mill.
What is the take away for this? It is that all of the major brands of grain mills do an excellent job, and you would very likely be satisfied with any of them. Very few people are ever dissatisfied with any of the major brand mills unless they happen to get one of the very rare examples that have a manufacturing defect.
I recommend that you base your decision on whatever factors are most important to you; cost, sexiness, heavy metal, number of rollers, length and thickness (you probably know if you stress over this kind of thing in other areas of your life), glowing reports (good luck, there is no differentiation here), or astrological influences. You are almost guaranteed to be totally satisfied with your decision.
Now, to help support my made-up statistics, here is my obligatory response:
I use a crankandstein, and it is a piece of work, built like a brick outhouse. I'm totally satisfied, and I love it.