if you are interested ni the Opus i would give them a call or email. they are VERY helpful.
i spoke with them for about 45mins one day , detailing everything i need to provide power to, and "he" was able to calculate everything needed and tell me which psu to get.
or advise if i need two PSU's
i am currently using the OPUS 250, the 360 was not available at the time of my purchase
i have 2 HDDs, 10 USB devices, 1 stick of ram, a mini atx motherboard with one on-board fan.
he advised i maybe pushing the limited of the 250, so he advised i either get the POL device to power an powered USB hub to offset the load of the 250w opus. or get a 2nd psu