The Bitmain APW3 supply looks ok and seems to be a reasonable price. Anyone had any issues with them? By the time I factor in getting the HP DPS1200 supply, PCIe cables and either a breakout board or time to solder the pigtails straight to the connector, the price seems to be quite good.
My current two HP power supplies were out of a decommissioned server at work, so free.
Go for the Bitmain PSU's. I used to use the HP's and yes even have a few IBM 2Kw PSU's but for the same reasons you mentioned (hassle factor) I started using the Bitmain ones soon after they came out a few years ago. Have a couple dozen of them now and zero problems ever.