Coolmaster PSU

Here is a link to a technical review of the Coolermaster Silent Pro M600:

http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story&reid=134

You should be okay. However, the review recommended the Corsair HX620 over the Coolermaster M600.

Here's a link to a technical review of the OCZ ModXStream-Pro 600:

http://www.overclockersclub.com/reviews/ocz_mxs_pro_600w/

The OCZ unit is not exactly a stellar power supply.