3) We dont have exact power numbers for the bASIC, but 300W is a little high. That number about the 1000W PSU being able to drive 10 bASICs doesn't clarify whether that's the 27 or 54GH/s units, but I'm inclined to think the second. I'm guessing 1000W will power either 10 27GH/s units, or 5 54GH/s units.

I personally use these on my fpga rigs - one of these 1000 watt babies will easily power 8-10 54Gh/s bASICS