Probably the only thread I'll ever post in so here are my pew pew sticks.
I have a RRA LAR-15 1:9 twist with a shitty wally world red dot, definitely going to be the first thing I work on when I get some shekels. Iver Johnson 45. Hawk 1911 with a Baretta bobcat 21 and...
I agree that upgrading at this point would be moot, replacing the motherboard would mean exchanging most of the parts inside of the comp. You can build a decent rig for about 700$ with parts from newegg or amazon without paying for peripherals and such, GL.