Perhaps buy a gold Lunar 1oz gold coin, that way you may get numismatic appreciation in the years to come.
Having said that, if you are set on buying a gold bar, I'd tend to buy the 1oz Perth serialized bar which has a mintage of 15,000.
The minted gold bars are pretty good too but be very sure of what your buying; some folk on the forum have warned of counterfeit minted gold bars on ebay.