The transfer window is open and Celtic will undoubtedly scour the world for new arrivals between now and early September. Brendan Rodgers has made his desire to bring ‘quality’ to Parkhead abundant; however, talent comes in all shapes and sizes, and there isn’t one clear market that represents better value for money than the next. However, the Premier League is a familiar haunt for the manager, owing to his extensive time spent in the English top flight and experience of seeing many active players in the division at close quarters. Of course, that doesn’t mean Rodgers will look to shop there, …