The best scale period is a RCBS 1010, it will run you around $150-160 new. Has the best warentee in the world. I personaly would not buy one new, they can be found on forum site, and on ebay for much less. RCBS doesn't make the sale it is actulay made by OHAUS, try that on an ebay search. OHAUS also made scales for Lyman that is why the Lyman m5 looks like a RCBS 10/10 because it is the same scale. You should be able to get a good one for around $60-$75 bucks used. If you desire the utmost in accuracy there was a guy on 6Br that would tuen the 10/10's to pick up on a grain of powder diference. He also sold tuned scales are great prices.

just a FYI OHAUS also makes powder measures, for some reason it is identical to the Forster becnhrest model.