I agree grade over label is more important. But at least equally important is how I like the coin. For example some types of toning is really attractive but others I find obnoxious even for the same grade. In the case of the America Silver Eagle proof coins I am very picky about making sure there are no (obvious) milk spots. And of course the value of a coin is what a buyer is willing to pay - not what a seller necessarily asks.
Thanks for everyone's input, Phil