I got my Raydream Studio 5.5 around the same time I saw an alpha version of Carrara during the Seybold Conference in San Francisco back in Sept. I was totally amazed by the demo and now I regretted not waiting a bit longer for Carrara's release. Now, that Carrara's finally being released I'm still a novice at Raydream Studio to upgrade to the new product. My advice is to stick with Raydream for now and get comfortable with it before you move on to Carrara. I heard from MetaCreations that you'll get an upgrade discount if you previously own RayDream or Infini-D.