With furniture its hard to tell whether you are getting a good bargain in the north unless you can directly compare the model, the leather, delivery costs.
Personally I think if you go into a shop in the south and negotiate you will get just as good a deal.With the likes of Next and other big named companies the price on the ticket is the price so its hard to know whether that's a good price in the first place and you wont be able to compare the model as these companies probably have the design to themselves. All you are doing is comparing the Next UK price to the Next price in the south. That dosent mean its good value in the first place.