Strident , interesting word. How willing are you to change your doctrine of purgatory, real presence and salvation by faith and works in the name of unity?
First, please accept my complements on your use of Latin in your tag line, although I am not certain that the Council at Nicea actually used the term "sola scriptura". Second, I am Anglican, not RC, so some of the doctrines you listed are NA. Third, in answer to your question, I would sacrifice false doctrine for the truth. We have wonderful discussions with our Calvinist friends, and have come to a deeper understanding of many areas of scripture as a result. However in other areas, Calvin seems to be overreaching and reactionary, and we are unconvinced on these points.