Watch the XSI tutorials. You'll see that setting up the same type of scene in Carrara is easier. I mean setting up GI in XSI is crazy, and you get the same results as you would with a few clicks in Carrara. Infocentral can be a bother all he wants, he just wants people to get all tiffed up, I love Carrara, and each version gets better. So I'm sticking with Carrara. Pro is on its way:)