I've taken a couple of years off from working with Poser after my last experience with P5 (which was abismal).  About a year ago I upgraded to P6, but my current machine couldn't handle it, so everything was once more put on the shelf while I worked on real-world home improvements.  Things are winding down now and I'm ready to start modeling again.  

After years being "PC" I'm about to buy my first Mac.  After careful consideration, I want the new "Mac Pro".  

Q:  Is there anyone out there on a Mac Pro running a dual 2.66Ghz processor with 4Gig RAM and using P7?  

I've searched the forum for "Mac Pro" and found lots of speculation about the new Pro chipset and PC vs. Mac discussions, but nothing with a recent date about how the Pro handles Poser 7.  I want a Mac Pro  with the above specs with the idea I'd upgrade in the future as money allows.  To help determine if I really want to buy P7, I must ask the following questions:
Q:  Which video card should I choose?  
Q:  Is P7 as RAM hungry as P4-6 seemed, or has the programing changed to take advantage of the new technology?  
Q:  Will 4Gig RAM be enough to quickly render static images (no animation)?
Q:  Will old PC Poser files transfer to the Mac program if they are already uncompressed?
Q:  How much of a hassle is it to use the MacConverter program to use typical Poser content?
Any advice is greatly appreciated.

TygerCub