Yeah, just ignore hardly's comment about the psu being crap. Bequiet actually produces very good power supplies and you can be confident that if the spec sheet says 30A @ 12V, that's what the unit will deliver.
I say give it a try, but keep an eye on the 12V, 5V and 3.3V voltages (use a program like cpuid hardware monitor, http://www.cpuid.com/softwares/hwmonitor.html). If they deviate for more than 5% from their nominal values under load, the psu is being dangerously overstressed.