Hrmmm... I'll try switching back to XP and run some test. I'm actually a little curious as to how the numbers will differ. And I don't know I did jump around from program to program until I fell in love with cinema 4d interface and heirarchy structure. I like the fact that I can loft a surface and tweak it on the fly. I know that rhino 4 has a "history" feature that allows you to do something similar to this but its different. I'm primarily interested in the archviz sector and have found that the C4D interface as the best overall for my purposes. I'm not going to lie I'm completely self-taught-- The only course I've ever taken in CAD has been on Archicad. With that said, I love how easy it was for me to learn the interface in C4D. I didn't like how illogically scattered features were in 3dmax. Also, I'm confused the Vray for C4D isn't out yet. And the way its being designed is that its fully integrated into the program. Isn't it a little too soon to pass judgement on it?