Anyone have experience using a new 8 core Mac Pro system? I just ordered one and am wondering what real world usage is offering. I suppose I'm just second guessing myself for paying more for the extra cores. I ordered it in the two 2.26GHz Quad-Core version, 12Gs, 2 optical drives and the ATI graphics option. Let me know how it's going. BTW, I'll be using this for 3D CAT-Scan guided, dental implant imaging- volumetric 3-dimensional imaging of human skulls. Among other fun things!