I currently am on my second pair of Vandersteen 3A sigs (nothing wrong with the first pair, just tried something different for awhile). I don't think you will be satisfied with just 60 watts of power.
In fact, they are really best when vertically bi-amped which means two amps per speaker. That doesn't have to be as expensive as it sounds. I first started out with a Audio Research 100 mk amp which mated well with the Vandys. Then, to experiment with vertical bi-amping, I switched to a used Theata Dreadnaugt with 5 channels. One, of course, goes unused (now I have a back up :) ). I would never go back to a single amp per channel with the 3A sigs.
In fact, they are really best when vertically bi-amped which means two amps per speaker. That doesn't have to be as expensive as it sounds. I first started out with a Audio Research 100 mk amp which mated well with the Vandys. Then, to experiment with vertical bi-amping, I switched to a used Theata Dreadnaugt with 5 channels. One, of course, goes unused (now I have a back up :) ). I would never go back to a single amp per channel with the 3A sigs.