CORSAIR RMx Series RM1000x ATX Power Supply - Fully Modular - ATX 3.1 - PCIe 5.1 - Cybenetics Gold - Low-Noise - Japanese Capacitors - 1000 Watts

For whatever reason, Walmart (sold by Newegg) lists the RM1000x as $138.39 for me; you might have to click a checkbox to apply an extra $21.90 off). It's not $129, but I decided to pull the trigger to complement a Microcenter bundle. (If I missed out on saving another $10 next week, it probably wouldn't be worth the hassle to make a return trip to Walmart unless I'm already in the area.)