i would give as a hint to wait a 6-12 months after its release, to look for common bugs, problems, durations of hardware,
also a hint is when its in sale, to buy it then, (if its a 250GB hdd its just fine) (just buy a extra 1TB combiable HDD for it) this also saves money and you have MORE space. (it can fit around 19 times GTA V + patches [wich is said to be one of the largest games])
so in short
buy it 6-12 months later when on sale
look for common bugs
buy a extra 1TB hdd for more space (will save you money, if you buy a 250GB version)