So I have iMac (21.5-inch, Late 2009) 3.06 GHz Intel Core 2 Duo NVIDIA GeForce 9400 256 MB 500gb hd about 1/3 full 2/3 empty 12gb Ram--maxxed out I was wondering how much faster and more efficient are the newer iMacs? The issue I have is that I need to run parallels with windoz xp so I can run quickbooks for multiple users. I also use chrome as my browser because it seems that safari is a resource hog. I usually have about 15-20 tabs open at a time and Im constantly having to quit chrome or quit quickbooks/parallels in order to get my ram back otherwise my system is bogged down after about 5 hours of use. Once I quit chrome or quickbooks it frees up the ram and then I re-start the process as the day goes on... I dont use the native mail on osx I use gmail in a browser. Any suggestions or help would be great!