Another for WhipMix or Argen. Arguably, WhipMix provides the best-in-class support for 3Shape, they have more knowledge and experience than any other company we have worked with. CAP/Schein being the worst. We are currently with Argen, and the only complaints I have are that they sometimes just don't know how to address an issue - requiring 3Shape to get involved, which takes a long time. For most labs/issues, Argen should be sufficient. I would base my decision on which of the two is going to provide a better price/perk (you should be able to negotiate a better deal on other products they sell based on the relationship).