^ Bingo. That is also why I think people who make statements about a power cable, et. al. making a "world" of difference might notice more difference from a piece of equipment with a proper power supply and run thru a bog standard AC cord. A tight grip on the plug blades should only be a good thing, though not sure you would hear anything unless you are trying too hard.
As for outlets, the ones that used to be considered good for readily available (i.e., home improvement store or hardware store) were the Pass and Seymour 5262s. Of course that was before the Oyaides and whatever nonsense came on the market.
There's always the bargains here as well...