tomdabomb :
any alternative for around $700 that isn't pointless
Hey, I have I also been considering buying a GTX 780 recently, and I also happen to live in Australia!
Firstly, why are you even considering purchasing the 780 - what specific requirements do you have that requires such power? Speaking for myself, I recently purchased a Dell u3014 monitor and am finding that my older AMD 6870 just isn't cutting it anymore to push the pixels at 2560x1600 (compared to the 1920x1200 system I had running previously).
At the moment, a GTX 770 would probably be enough to run current games well enough at 2560x1600, but seeing as it's simply a rebranded 680, and that games will continue to be developed to a higher level of graphical fidelity, I don't think it's worth it buying an ageing Kepler chipset.
As for AMD, their 7970 (GHz edition) is a tier below the 780 - they can't compete with Nvidia in the high end market at the moment. Even though they're under a lot of stress delivering the hardware for the new consoles, I hope their 9000 series will come out soon.
The way I see it, the 9000 series will jump the gap to a new level of performance specifically targeted at 2560x1600 gamers, as well as offering preliminary 4K support (that's the rage nowdays, isn't it just). As 4K technology is slowly developing from the 'innovator' stage of product maturity, to the 'early adopters' stage, graphics card manufacturers will have an incentive to significantly improve their technology to cater for the emerging 4K market. In the next 3-5 years we will most probably see (at least) 100-200% performance gains on current technology, and this figure will be even greater for us with 'inferior' 2560x1600 displays. Nvidia will be releasing its Maxwell architecture next year (GTX 8xx), and AMD countering with Volcanic Islands (AMD 9xxx).
In my opinion, we are heading towards a major turning point in the performance of graphic processing units in this next year, so if you can hold out, I would. There's no reasonable alternatives in the market at the moment, and prices will surely have to come down once we have some serious competition between the two manufacturers later this year.