I have experience with none of those, but I can vouch for the
Le'Lit PL53. It's doserless with stepless worm gear adjustment. It makes about the noise of a louder cordless drill. While it's $20 over your budget, I think it's a great grinder that I happen to prefer to my Mazzer SJ. Hopefully others can chime in with a comparison, but in the mean time (if you're interested in this grinder), take a look at Dan K's notes about it
in this thread, starting at the linked post and onward.
Another benefit of purchasing at 1st-Line is that you're relatively close by (compared to Vaneli's, for example) in case any service issues come up and you'd rather not FedEx the grinder.
Good luck with the decision!