It is the Enhance EPS-1280GB4 model that stands out among the tested six. It’s got an eye-catching design, works very quietly throughout the entire load range, and offers sufficiently long and flexible detachable cables - everything for the user to feel comfortable with it. Although its electric properties are somewhat inferior to its cousin with fixed cables, the EPS-1280GB4 is superior to it in every other aspect.
The Scythe Chouriki 2 Plug-in features higher wattage and excellent efficiency combined with low noise at low and medium loads. Its voltages are not ideally stable at low loads, though. A high-end PSU can be expected to do better in this respect.
The Hiper PSUs proved to be rather weak in terms of their +12V load capacity. Their wattage ratings are overstated by a hundred watts. Besides, the K800 model has a terrible fan regulation algorithm which leads to a fan speed of 1800 RPM at a load of only 300 watts. On the other hand, the M600 won’t be a bad choice for a midrange PC thanks to its quiet operation and rich selection of connectors.
The Antec PSU that I took from a Sonata IV system case is just an average product without serious defects. It is noisy at above-average loads, though.
As for the Scythe Stronger 600 W Plug-in, I can understand why it has already been discontinued. Its cross-load characteristics are very poor.