Corsair RM650i
The 650i is shorter than the other power supplies in this series, which is why I bought this instead of one of the higher-wattage versions. I'm using it in a Fractal Design Define R5 case with a 140mm fan in the bottom center fan slot.
Quiet, stable, has a long warranty, and is from a company with a good track record for customer service if anything does go wrong; So far, it's been rock solid for me; The Corsair Link software that measures the PSU performance, system fan speeds, and temperatures works as advertised
The ATX; CPU; and PCI-E power cables have capacitors on them to help reduce ripple and provide cleaner power to the system; but it does make those cables a bit harder than normal to route cleanly because the first few inches of the cable is stiff.