Hi, I'm going to be moving soon, and I'm looking to buy a new (old) Mac. To save some money I was thinking that I'd buy either a Mac Pro 4,1 or 5,1 and do a CPU upgrade, likely to dual X5690's (2x 6 core 3.46GHz) and either 64gb or 128gb of RAM (both the CPUs and the RAM will be bought on ebay, so it depends on the offer at the time). The main use of this machine will be music composition in Pro Tools, with lots of instruments by EastWest and others hosted in Kontakt - hence the high RAM count. Other than this, the computer will be used for some video conversion, photo editing, web design/development and some general everyday tasks. I was also thinking about buying a GTX960 and using the Nvidia web drivers, so that I could power a 4k monitor (the Philips BDM4065UC looks really nice as the PPI is that of a 27" monitor at 2560x1440, so no funny scaling issues). Doing this, I've worked out that I can still get a full machine (I already have all the hard drives I need to get me going) for less than a Trash Can Mac Pro, and with a bit of waiting and patience on ebay or craigslist that can easily a LOT less. I just wonder how long you think something like this will last? The latest 5,1 came out in 2012, we're already in 2016 now. That's longer than any applecare that could've been bought with the computer at the time. How long do you think it will stand up against the current Trash Can Mac Pro? I get a feeling that there won't be any major changes to this design for a long time. I hope I'm wrong there, but It's been a while since it was released. Thanks!