In a bit of a quandary over my new iMac (new on 02/28/14) I have a new 27" iMac, 3.5 ghz i7, 16GB, 3TB Fusion and the 4GB video card. I still need need to use a laptop - occasionally. My laptop use dropped maybe 50-70% with my iPad use, but, I still need it. Current laptop is a Win 7 Pro Sony Vaio. While waiting for my iMac, I upgraded the HDD to a SSD and bumped the memory up to 8GB. Really impressed with the SSD improvement in boot up speed and general use. Something I did not consider before ordering the iMac is a) replacing the drive for whatever reason, b) leaving it behind when we camp. Too big to take along. And I wasn't worried about by old HP desktop getting ripped. I am under the 2 week return window for a few more days so I am considering return-exhange for a laptop. That said, I cannot find what the real differences are as far as performance goes between the high end iMac and the high end 15"Mac Pro (MBPr ?). I am just getting into video and FCP X on the iMac (main reason for switching from Windows to the Mac OS). I plan on keeping the following items I got with the desktop: USB keyboard (need the number pad) Trackpad Magic mouse 4TB Lacie TB external drive. USB Super drive Had I given it more thought when I ordered the iMac I probably would have gone right to the 1TB SSD and supplemented my storage with an external drive, especially since I have 7-8 drives in the 1 TB to 4TB range. Not knowing the real differences, is there a real world performance difference between the desktop and laptop? Video and photo edit would probably be the top of the power programs along with Quicken and Quickbooks under Windows. Everything I use I would assume are not real heavy on the CPU drain. Basing that on my current desktop is a XP Pro, 6 year old unit. I will be needing to use bootcamp and Parallels with Win 7 Pro on the partition. I would consider getting a refurb TB 27" display, or some other comparable desk display. Trade an: iMac 3.5 ghz quad core, i7, boost to 3.9 ghz 16GB ram 3TB Fusion HD NVIDIA GeForce GTX 780M - 4GB GDDR5 for a: 15"MacBook Pro Retina 2.6 ghz quad core i7, boost to 3.8 ghz 16GB ram 1TB SSD drive NVIDIA GeForce GT 750M - 2GB GDDR5 Pricing is almost the same, if you take the Hard drive storage out of the equation. Thanks in advance.