If you are in the market for Strathisla, than Gordon & MacPhail is the bottler of choice. They have countless of great vintages. This one from 1964 doesn't disappoint.
I don't think there's a shop in Europe that compares to Whisky Antique. Maybe there are some with more floor space, and others with a higher volume of bottles. But as far as I know there's no other shop of this size with a collection this rare.