I'm in the process of searching out a Mac Pro (4,1 or later, cheaper better) to use to replace my current 2011 iMac, which is starting to not be up to the work load. Mac uses will be as follows: -4K video editing, for the upcoming childrens/family videos -Plex servering, probably maxing out around 3 clients simultaneously -wife will use photoshop on it on occasion -video compression (bluray to MP4s, mostly, using handbrake) -normal computer use that you can do with a watch these days (internet, word, excel, whatever) .... and then, to make things more complicated, I need to be able to use it in Boot Camp for... -3D modeling using Inventor (Mechanical engineer, sometimes have to work from home) -around once per month play a 3D game. Very infrequently I value reliability over speed. So, I'd rather have a product with proper support from Apple than I would have the last 10% of performance. I'll be very sad if I run a software update and suddenly she won't boot up. I also really like the fusion drive in the iMac (which is DIY fusion, not OE), despite it not being super popular around here. But, takes all the effort of of SSD and retains 99% of the benefit... So, my ballpark plan is (and I'm open to suggestions for changes)... -2 processor 4,1 updated to 5,1 with a more modern Xeon (open to suggestions as to which, but price is a factor!) -48gb of ram (thought process being I've read that 3 channel is faster than 4, and 48gb is way more than I will need for a while, already... and cheaper to buy less) -graphics card: This is where I really need the most help. I need some sort of all purpose video card (good at video, good at 3D) that will play nice on both the Mac side and in BootCamp. I'd very much like it to work off the cMP's original power supply as well, but willing to give that up it's hugely beneficial to do so -some sort of USB3 card, would like suggestions here as well. Priorities are not having support from Apple dropped and working in Windows as well -a PCI based SSD, ideally with an Apple SSD so trim will be natively enabled. I have a non Apple SSD retrofitted in my iMac and am tired of fighting the TRIM battle with them. -The above SSD will be fused with a SATA platter drive in one of the SATA bays, probably a WD black unless there's suggestions for something better. Faster, better, as that'll likely be drive I do my video editing off of (pending suggestions to the contrary) -A large, slow HD in another SATA bay for time machine backup -A large, slow HD in another SATA bay for carbon copy cloaner backups -I'd like to have a second (non Apple) SSD for my windows boot. Is it possible to run two PCI SSDs, or is there only one slot that's fast enough to make that useful? -a bluray reader/writer to replace the factory optical drive. Needs to work on Mac and Windows side -kind of considering retrofitting a modern Airport/Bluetooth card, just because they seem cheap and I'll be annoyed if I somehow need it but don't have it. Lastly... is there any way to get a 5k display hooked up to this? I'd love to have 4k video editing at native resolution, with space for editing tools, ala the Retina iMac Thoughts/suggestions/tips/tricks/criticisms? Thanks! edit: To clarify, by "support from Apple" I meant not getting locked out of the OS due to unsupported hardware. I'm not expecting to be able to make warranty claims or take this thing to the genius bar! I just don't want to get locked out of the computer after installing an OS update.