@Fastline I also prefer Supermicro, I've been quite impressed with the longevity and quality of the products. As for Server or Workstation, I do think they are very similar so it comes down to what features you desire and the amount of money you want to spend. I have no idea what your use case will be but if you are not turning it into a Type-1 Hypervisor (my preference) or using TrueNAS to be a Type-2 Hypervisor, then I think you are wasting your money. While in some ways you can future proof the hardware, that isn't in all cases, and it depends on how far into the future you are talking about. Personally I think 10 years is a good length of time to plan for because in 10 years technology will have advanced and you will feel like you have an old system that chews through power. So my advice, buy for the next ten years, that is doable. But I would also say to buy all the RAM you will need unless it's an ungodly amount like 4TB. Buy the CPU that will last 10 years. Buy the motherboard which has reasonable expansion. The thing to look for these days is PCIe lanes due to NVMe mainly. If you are buying HDDs, buy them to last 3 to 5 years and then think about replacing them with NVMe, because those costs are coming down and the package density is going up. For myself, I am seriously looking into replacing my 4 6TB spinners with six 4TB NVMe drives in less than 6 months. The power savings is pretty significant when you run the system 24/7. You can also cram it into a smaller case.