a little too much theorycrafting in here. you can't stack the movers coupon online with the discount, its one or the other. Maybe in store you will have better luck but probably not, since the Black Friday sale is applied as a discount coupon and BB systems don't stack coupons.
also the refurb systems you get from Nintendo have been brand new for a while now, it could change anytime of course once they run out of returned stocks. either way both deals are good and you should do what is more comfortable for you - if you can go into store and stack movers and discount and have a BB credit card its a good deal.
don't forget best buys DOTD today is nintendo land + green luigi motion+ controller for $40, if you buy this wii u can grab that too for an extra controller. absolutely get MK8 and a wii u pro controller.
I'm sure another great deal will come around before end of the year too, it would be cool if they had a special edition Smash Bros Wii U.