Hey guys, been waiting a couple of months for the new iMac. Since it never shows up I have been looking to maybe buy a used one. Ive found some 27" late 2011 modell. This will be my first computer where I will work with programs such as Corel painter and Photo shop. My concern is how the 6770M with 512 MB will be able to handle these programs? Any input will be much appreciated.