I just built mine last week. That was a first for me in ~7 years. The box it just replaced was around 4 years old (needless to say, I'm not a gamer either). I went back and forth with TomsHardware, Newegg, etc. reviews narrowing it down. Ended up with a fairly cheap system ($500'ish) that does me fine. All items with a cost came from Microcenter:
Case: Gutted system but reused my previous Asus microATX case.
PSU: Reused same PSU. Little 400w thing seems to be okay. It's not powering much.
RAM: 4x4GB sticks, bought within the last year when I upgraded from 8GB. Reused those also.
Mainboard: H97M-Plus ($114)
CPU: Intel i5-4590, firstname.lastname@example.orgGhz up from my previous i5-650 dual core. ($200).
Video: Integrated CPU video card. I'm fine with it.
SDD: Samsung 250GB EVO840 ($139)
HDD: Seagate Barracuda, 2TB ($78. I don't need much space. Coupled with my old 1TB drive, I'm good for awhile)