Yea thanks, I'm going to go ahead and purchase the parts. Reddit didn't really help in the end so thanks guys!
Reddit wanted you to have a gaming computer, not a Minecraft server. You could still have a gaming computer if you get a video card later on for it.
And I got my replacement PSU today, I actually have steady voltages now (1.403V VCORE, 3.348V 3V, 5.021V 5V, 12.038 12V)
I get a better video card performance now too (the fan actually runs on it!)