With the kind and patient help and guidance of
We managed to narrow it down to a PSU issue, it's wiring, or the region of the mobo it connects to. Given the recent random outages here and there, it's unsurprising, but I'll take that over my RAID array being fried lol.
So my data is fine. Window's started up with little to no hassle after leaving the system unplugged overnight, but my machine still behaves abnormally here and there, with the lights the LED's going off and on, and the fans flaring up and then slowing back to normal on the windows welcome screen. Still getting cable errors when I run the ePSA.
When I took it apart myself (and what a nightmare that was) I identified the cables it was referring to, which come from the PSU and plug into the mobo towards the bottom. So whatever it is, it's has to be linked to that area. I don't want to run it too much for now until I make sure, and then put in an order for a new whatever. It makes my wallet a little sad, but at least my data is intact. Even though I make backups of backups, I'm still relieved my original set is just fine. Just when windows fails to start and HDDs vanish out of the machine suddenly, one starts to wonder. I backed up Firebrand, deactivated some of my product licenses and saved some general data while I was on there earlier, so I should be set. Gonna have to postpone animation work still for a bit though, sorry fellas.
PS- Also I always keep my BIOS, drivers, and everything else up to date. I'm bad with the hardware portion, but I generally know what I'm doing with the program/software side of things. Plus I'd have to be braindead not to keep things current anyway. lol
Thank you to everyone who offered their suggestions ^^ Means a lot to me guys!