I enjoy doing everything better in carrara instead of rds 5.5, and since I don't have superhuman speed that makes me crash my computer like clint in the modeler, I don't use rds at all anymore. True there are a few things better in rds, but Carrara also has some better stuff. Unless you've been working on rds 80hrs/week 50week/year(Like most of the people here) you should like Carrara, especially if you didn't have infini-d before