I am really having hard time deciding. The r9 290 sapphire model retails for $500 in australia whereas the gtx780 Asus direct cu II would cost me around $600 (Imported via amazon)
which one of them would be better option here? I plan to keep this gpu for about 1-2 years
Just going to let you know mate. Amazon doesn't ship about 95% of there items to Australia. which sucks. so you might need to look else where, maybe try PC Case Gear.