Of all the 'components' one can purchase for an engine, oil has to be one of the cheapest. True it must be replaced more frequently, but doing so can prevent the need to replace other, more costly components.
Go with best. You could be shocked to find what goes into bargain oil deals. I speak as one who worked, years ago, for a wheeler and a dealer. I could not believe the lack of manufacturing control and consistency (you never knew what would come out of the can) just to be a market price leader.
Personally, I am not happy with less than MOBIL ONE. Period.