thanks for the reply
the thought did cross my mind that i might want to try the a'bunadh. it just wasn't available at the store from which i bought the other 4 bottles, which were the base purchases (my "50 years of scotch": 16; 12; 12; & 10). i'll keep it in mind. i would be willing to take a chance on variation between batches to try a small-batch bottling. it just sounds like a more personal experience, somehow, and a bit exciting... i'll keep a lookout for the a'bunadh in future--although the next chance for a big purchase is probably around the end of the year!