I am struggling here. I am on my 2005 iMac and while it has been a great machine, it just can't keep up anymore. Time to upgrade. I saw the new benchtests and honestly don't know how to read them. Could someone put them in laymans terms for me? I know the current rMBP is more than enough machine, but I am trying to hold out so I have and know all my options. Also, I always thought that a separate, discrete graphics card was preferrable to an integrated one. Now I am reading other opinions on this. What is the general consensus?