The PC Power & Cooling Silencer Mk III 750W made a very good impression. It's semi-passive, up until 500 watts the fan doesn't turn on. It's very efficient, like you expect from an 80 Plus Gold model. The ripple is a little higher than average, but nothing to be worried about. The voltages remain within the 5 percent margins even at max capacity. The white PSU has a very nice finish as well, with screw-in connectors.
Any major computer upgrade generally requires a full software reinstall too. No so if you heed the advice in the guide to Upgrading a Motherboard without Reinstalling. PCSTATS Tips