Hi, I am intending to purchase macpro after my mac pro 2007 finally died on me. I am contemplating whether i should go with One 3.33GHz 6-Core Intel Xeon processor or Two 3.06GHz 6-Core Intel Xeon. My primary usage is as followed. 1) Running of VMware (Linux OS) to run Crystal reports 2) Running of VMWare (WinXP) to perform batch jobs processing on MS Access. 3) Email, MS Office, Skype, BT I do have the intention to buy iMac. But i am not comfortable with the all in one build in hardware which i have to bring in everything should there be any hardware failure. Hence i decided to give it a pass.