I use a 350w Enermax with that board on one of my machines and it works just fine.
Noise level is average I suppose, but it's a subjective thing. What may be average to me, may be noisy to you or visa versa.
I've not heard the same comments as you, but that's not say your wrong. However, with cases being offered now with power supply at under £20, is it any wonder that some PSU's are below par. The KG7-Raid, although dated now, was a high performance board when first launched, and so required top quality components to go with it.