I'm an industrial designer and am about to buy my next iMac. I will use the new machine for web-browsing, working in CS5, and doing some polygonal modeling in ZBrush, Modo, and Maya. I'd possibly do some rendering as well in Maya and Modo. The 27" iMac i7 looks pretty good. How would I benefit from the 2GB of VRAM? Real-time rendering? Manipulating huge polysets? Thanks in advance.