My 2 cents: You don't say if you are on a Mac or PC, but if you are using the Mac version, I would recommend not going to Carrara until Eovia comes out with a fix. The Mac version of Carrara has some serious stability problems. Apparently, PC users got a better product and weren't as happy with RDS. I have been a long time user of Ray Dream and have always been happy with its performance and stability, with the exception of the vertex modeler which is intolerable in my opinion. If you use that feature in RDS, you'll really love the Carrara implementation. I recently purchased a new Dual-processor G-4/500 with 1.2gigabyte RAM and the new NVidia card. As an experiment, since I can never keep Carrara running reliably on anything else, I gave the application 1 full gigabyte of RAM and still had the same crashes and freezes as before; especially when using physics or complex procedural shaders. In spite of all the problems, I will jump on the "new and improved" Carrara when it comes out because the program is just plain cool! mclarsen