I notice that cheapest filter I can get in Canada is the Canadian Tire brand filter, which is just made by Fram according to one of the thread I read in this forum. Canadian Tire is selling this for $4.39 (the size for my Intrepid) or somewhere around there. A regular Fram filter which is the Extra Guard line is just 30-50 cents more expensive than the Canadian Tire one. Other brands like Quaker State and Maxlife are also available for a buck or two more expensive. I've seen Mobile 1 either in Walmart of CT about a year ago but not recently.
I, myself, not really crazy about oil and filter. And I tend to buy what they put up on sale, usually its like a jug of oil and a filter combo deal, and I don't see anything wrong with it. Even if I'm moving from regular oil to synthetic I think I'll still use the more economical filter.