The C550 is a much better power supply than the MWE v2 550w even without factoring in the burst mode problems that are present on the MWE v2. There are no professional reviews that I can see for the C550 but the C750 has pretty decent reviews and does have a low inrush current as noted in the Aris review of that unit. The 550w model shouldn't be terribly different. You don't need to worry about the "Tom's hardware reviewer"s" process. Aris is most probably the absolute top PSU reviewer in the world and whatever his process is, there is unlikely to be any process that can achieve more accurate or consistent test results. Aris is the reviewer that all other reviewers look to emulate, for the most part. He's also the founder of Cybenetics and if you don't know what that is, you might want to go find out.
The NZXT C750 offers good performance, but its fan speed profile could be more relaxed.
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