I plan on getting the new 27" iMac, but plan to boot into OSX with an external SSD. I have two questions: If I get the standard 1GB HDD (rather than fusion), would I be able to boot into Windows on it? Secondly, I understand that SSD helps speed up opening up applications among other operations, but would it actually have any impact on gaming once you're in the game playing? So, in other words, would the standard 1GB HDD have any impact on gaming performance? I would be upgrading the graphics card to the 680MX along with the i7.