My personal opinion would be to
buy something like this:
https://www.bitcoinasic.net/index.php?route=product/product&product_id=54which is a highly efficient and top notch PSU - as far as I know the only PSU certified to platinum efficiency status is Seasonic.
I personally use these on my fpga rigs - one of these 1000 watt babies will easily power 8-10 54Gh/s bASICS
I would have to agree, I've got one of these in my main PC, it's quiet modular and powerful. It's by far the nicest PSU I've ever purchased.