Check the mintage figures and go for the lowest. That is usually the uncirculated version. Numismatic News and Coin World list mintage figures for new products sometimes. They are weekly coin magazines and most coin dealers have them. Also keep an eye on the prices dealers get for the items. I would say the Braille uncirculated dollar would have the lowest mintage. PCGS as well as NGC are the 2 top grading services but at least for now a lot of dealers like PCGS the best. That could change in the future.