Well I just put in my order for my 27" iMac and I am stoked. got the i7/1tb fusion/4gb vram and will be plugging in 2 dell 27" monitors. How hard is it to install the VESA mount? They offer an iMac arm that comes with the VESA adapter, but I can't seem to find a general consensus on the installation. Does anyone have any pictures of their iMac standing vertically? Just curious to see how that would look. Anyways, I am stoked! I had to go through 3 machines to finally find the one that will easily do what I need it to do (2 13" rMBP, and base 15" rMBP). Where is a good place to find wallpaper and order ram? Crucial has 16gb's for $170.