My bottle of Buffalo Trace only had half of my usual pour left. So, I decided to experiment a bit. I briefly considered adding some Laphroaig, but thought that peat might not work well with bourbon, except maybe in eyedropper quantities. So, I decided to go with some Aberlour A'Bunadh Batch #7 instead, and made a 50-50 mix of the two.
This is a very good combination. The Aberlour's intense sherry complements the BT's bourbon sweetness very nicely - neither drowns out the other, and the BT's rye floats in the background.