Get a good motherboard which is bit future proof and get a good quality PSU.
If your mobo is future proof than you just slap a new nextgen gpu without upgrading whole rig. You gotta do some research online. Sucks Alpha and JoeCool not here, they were expert at suggesting you best in price PC parts.
Dont get me wrong, it's not cheap but still best option for high end gaming in India is PC imo. All latest Parts are easily available with warranty. You dont have to wait like Ponies waiting for Pro release in India