The BitFenix Formula Gold 750 W is one of the quietest PSUs in the sub-$100 category, and it performs very well in all other areas. Its fixed cables are the only compromise - you clearly cannot have it all at such an affordable price.
You do software updates to get the most from favourite programs right? Updating a motherboard BIOS can in a timely manner is also critical. The guide to Flashing a Motherboard BIOS spells out the often complicated steps in plain english. PCSTATS Tips