do not buy formlabs for crown and bridge. they're garbage. accuracy sucks, reliability sucks and prints fail way too often. we went through 4 of them. they're ok for ortho, however.
also, avoid closed systems like the plague. we have an envisiontec. it's reliable, accurate and we've never had a single failed print (except due to user fault). but it's closed, and we're paying outrageous prices for the resin.