You're definitely right to question that PSU choice - most of what Raidmax makes is absolute crap, I've used their cases at work (who tends to purchase a lot of junk brands like Ultra, Apevia, Raidmax, Xclio, and Xion) and they've fallen apart easily. If their cases are bad, I wouldn't trust their PSUs.
With PSUs, you definitely get what you pay for, and the cheaper the PSU is, the worse it is in most cases. You want a good, solid, strong
Never look at the one egg reviews. It's all idiots that use it incorrectly or its doa so they rant and rave. It has 4 eggs and almost 150 reviews, it's a good psu. It sure as hell is better than the one you were going to get before.......
It is true that newegg reviews are usually not worth reading. But I wouldn't go for it either, especially not at $70.
The XFX Pro 550W Core Edition is a better buy, more 12V capacity (504W vs 528W), higher temperature rating (30C vs 50C).
If the CX600 V2 has the same choice of capacitors that the CX430 V2 has, then it has inferior capacitors to the XFX. (85C Samxon primary, 105C Teapo and Samxon secondaries vs 105C Chemi Con all round).
I suppose some of these differences could be considered academic, but the XFX is still the better unit.