Hi,
it depends on how much moola you want to spend... ATX power supplies are very expensive when it comes to Rand/watt. If you compare, for instance a 1200W ATX PSU against a 1200W Server PSU, the latter will be much cheaper.
However, the server PSU cannot be used as is. It needs a breakout board. I have just imported a 1400W Server PSU with a breakout board from Parallel Miner in the US, and it was much cheaper than my Thermaltake 1200W RGB PSU.
A server PSU is only loud if you run it near to full load. But yes, they can get a bit loud