260Xes(rebranded 7790) is a step higher then 7750s are, so you should get one of these.
https://www.newegg.com/Product/Produc...D=3938566&SID=
Newegg has a pretty good deal on the Powercolor version(69.99 dollars with a 30 dollars MIR)
Edit:Oh, shizzle, you're from Austraila..
Well, then the GPU you chose would be the best choice.