What's emotion got to do with it. You like Metz, good for you. All I know is Avon's have made me far more confident than I ever was with the Metz - how does that make me illogical or emotional? Get real.
As much as you may think that people buy on logic, any good salesman will tell you that the huge majority (if not all) buying decisions are made on emotion. Hence the expression, sell the sizzle - not the steak.