So, I finally got my Intel i9 7900X/ Gigabyte X299 Gaming 9 with 2 Samsung 960 Pro 1TB SSD assembled in a Coolermaster Mastercase Maker 5t case with 64 GB of Corsair RAM. The case has 2 tempered glass side panels and looks great with all the LED lighting on the MB and fans, etc. I didn't used to think very much about all the lighting, but having seen it in action, I changed my mind, and upgraded the stock fans with Corsair HD 140mm RGB and Corsair ML 140mm ones. The ML series uses magnetic levitation instead of bearings and has a higher range of speeds. The case is very attractive and can accommodate the larger 140mm fans and more of them (2 on top, 2 or 3 on the front, 1 on the bottom, and 1 on the back). It isn't cheap, but well worth the price.
I'd highly recommend getting the X299 (Intel) and X399 (AMD) motherboards because they have M.2 SSD slots that use 4 PCIe lanes that are 5 times as fast as the SSD SATA 3 specification (32Gb's per second vs. 6 Gb's per second). They also have USB 3.1 and USB C ports, and some can use Thunderbolt 3 (using a USB C connector) that runs at 40 Gb's per second. (I need Thunderbolt for my audio recording, now that Microsoft has finally adopted TB in the latest Windows 10).
One problem with the setup is that you cannot set up a bootable RAID array, which I only discovered after the fact. Intel will not allow any but their own SSD's to be used at this point, and will charge you for a dongle that plugs into the MB. The technology is called VROC (virtual raid on CPU). It's still in it's infancy, and it will be awhile before things settle down. The idea is that the boot disk connects directly to the CPU rather than going through the chipset. (With the X299, there is one M.2 slot that goes directly to the CPU using 4 PCIe lanes to get 32 Gb's per second). The system speed is pretty amazing compared to my old SSD RAID 0 setup using SATA. (Apparently, there is a method whereby you can install Windows on a bootable SSD RAID array using UEFI instead of BIOS despite Intel's limitations; I will be getting my builder to try it out, although he is behind the times in technology and I have to get him up to speed first).
I am having trouble with my build at present; sometimes the PC will constantly try to start and fail until the power is removed and then restored, and now, it does the same thing while running, which makes it kind of useless, you might say. I suspect the power supply, but it might be the MB, which would be a disaster as It's too late to return it and I would have to send it back to Gigabyte under warranty. I've never had any trouble with my other Gigabyte MB's, but maybe this one is a lemon. Having been to the Gigabyte forums, it doesn't appear that they have a stellar reputation for doing warranty work. I have since bought another X299 Gaming 9 MB because I can't wait months to find out if they can or will fix it. My next move is trying out a new power supply first, hoping that that is the problem.
It's been an adventure; hopefully there will be a happy ending.