I've been thinking about upgrading my early 2011 MacBook Pro 13" as it's getting a bit long in the tooth, and isn't coping too well with some tasks, e.g Lightroom with 24MP RAW files. I'd pretty much decided on replacing it with an iMac 5K with the 3.5 GHz i5 and M290X graphics card. However, I've recently got a DJI Phantom 3 Professional, which can shoot 4K video, but editing this brings my MBP to its knees . So, I'm wondering if I should look at some upgrades for the iMac... 1) I think the i7 CPU would be almost a no brainer for working with 4K video. Would that be a good idea? 2) Would the GPU upgrade be a good idea for 4K editing, or will the base GPU be OK? I'm not going to be editing hours worth of video on a regular basis. Also, I'm concerned about the reports on here that the M295X fans running at higher levels than the M290X. I'd rather stick with he stock GPU if it's not going to make that much difference for what I want to do. The rest of the specs would be pretty much unchanged - standard RAM from Apple, upgraded with third party stuff, and the 1TB fusion drive, possibly with an additional USB3 drive as needed. Any comments on my upgrade ideas? Thanks, Dave.