If you get your BD in the US and most of Europe compatible. And pwede naman i hack most of the players to region free. here's the reference of the region codes.
Although a large portion of all Blu-ray movies are region free (when this is written about two-thirds of all Blu-ray movies are region free) below is a map of the official regions.
Region A: America, Japan, Korea, South East Asia
Region B: Greenland, Europa, Africa, Middle East, Australia, New Zealand
Region C: China, India, Russia, Bangladesh, Nepal, Pakistan, Central, and South Asia.