daddybutter
You can get GPUs as new as Nvidia's GTX 900s and AMD's R9 300s which will be DVI-I capable (DVI-I or DVI-A are what you're looking for, not DVI-D). You can then use a DVI to VGA to composite adapter chain for perfect, lagless CRT video output.
Yeah, sounds similar to what I've heard. Like you said though, they are absolutely beautiful. Even if I barely drove it, it would make me soooo happy to just see it in the driveway every day.
Current: 90 4Runner (running), 00 Malibu (not running)
Previous: 73 240z, 88 RX-7, 89 Golf Wolfsburg Edition, 89 CRX Si, 87 Civic sedan, 88 Civic sedan, 96 Civic hatch.
I want another 240z and an FD RX-7.
Swap the 5700X for a 5600X and bump the 6500XT up to a 6600 (non-xt is fine). They won't notice any difference with the CPU swap and that frees up the money to switch to a better GPU with 8gb vram which will keep them happy for much longer. I ran a 6600 for a while at 1440p and was impressed by it especially for how little I spent. Other than that, should do fine. Silicon Power has had reliability issues in the past, not sure if they got better. I ran an SP drive for a few years and didn't have issues fwiw, but you may want to see if there's anything in recent reviews about their ssds.
That seems like a pretty extreme measure for protection and I have so many questions... How often are you using wet hands with your mouse? Are the vents directly below the edge of the desk/table so that any liquid would drop off directly into the vents? Could you simply push the desktop back a little and not have the vents directly below the edge where liquids might fall? Do you have a cloth mousepad that would likely pick up any small amount of liquid that might come off your hand?
There should be a gap on one side of the socket where you can lift from, as seen on the left side of this pic. Disregard the red circle, this is from a messed up pin post lol 
Nice, where'd you find the pic? I briefly looked to confirm my hunch but didn't find it.
Probably the GPU support. Top piece screws into the body for height adjustment.
In that case, I'd be inclined to agree with Rimu about it being PSU related. I'd recommend carefully inspecting your 24 pin power cable and motherboard plug to see if any of the pins are damaged. Also, if you can, try and give each individual wire a little tug. Sometimes the pin isn't locked in properly and when you plug the cable in, the individual pin will get pushed out.
How are your fans connected? Directly to motherboard? Fan controller? Daisy chained off one plug?
I'm a big fan of Fractal's Meshify 2 (or XL version depending on the parts). Easy to build in and clean, breathes well, tons of options for just about every configuration you could throw at it. I've used it for multiple builds and will always recommend it.