Best Buy has always pricematched the B1G1, B2G1 style deals for me. Your best bet, OP, is to call up the local store and very kindly state that a certain store has X on sale for $Y and ask if they will price match. If they say yes, get the clerk's name and tell them you'll be in within a certain amount of time and see if they will still be there. If so, ask for them by name. If not, ask them who you should speak with when you get there.
They've always been very good to work with.
Now with the coupon, you're probably pressing your luck because the coupon is 12% off regular price. Not to say that it's not worth trying though!