I just purchased the 21.5" 3.06Ghz i3, 4GB iMac last week. I see they have upgraded the 13" MBP with an i5 Dual core processor. Does the upgraded MBP 13" i5 have more power than the iMac i just bought? Or am I still better off with the iMac? I will be using the computer for a digital audio workstation. Thanks.