I use photoshop constantly with several layers and illustrator some. Currently using a 2010 iMac 21" 8gb ram 32 gHz i3 with 1tb. Am looking to upgrade as this one is really too slow. Wondering if I should special order the i7 processor (would it be that much better for editing?) Also, if special ordering I'd increase the ram at that time to 16gb. If I purchase an in-stock i5 I can up the ram later... Appreciate any thoughts/experience.