Some excellent recommendations for great commercial butter on this thread, and until last year I would have been in heaven with any of them..... but now I have been spoiled and have found butter that blows these away. Hand churned butter sold at a few markets in Melbourne Australia. Amazing what a difference freshness makes, plus milk in Australia tastes soooo much better than US or even France or Switzerland (my prior high water mark for good tasting milk). This really results in a difference you can taste, but it is not sold in supermarkets! The Tetsuya butter is great mostly due to this (the trufle addition really doesn't do that much more for the great taste, but helps to justify the stratospheric price -- $100/lb anyone?).