What's your budget?

 

Why X79/LGA2011? You're only using 17 lanes and the 4820K has only 4 cores. The PSU, while reviewed well, is made by Chicony which has never made high quality PSUs before so I'm a bit weary of them. The 650W version is made by Channel Well Technology and is more than enough for what you've listed.

Other than that, looks pretty good.

EDIT: Here's a partslist I just put together that should match your needs. You lose Hyper-threading but most everything else is either more cost effective or better performance.

 

Are you buying from that website? Just took a quick look at the GPU and even without rebates (Since they might not work outside US), its 90$ cheaper on NCIX and 64$ cheaper on Newegg. Pretty sure they don't ship outside US, but you might be able to use a package forwarder and still save a nice amount on some smaller parts.

Also do you need 32 GB RAM? If its just for gaming, I'd say go with 16 GB and it would be more than enough.

 

If I'm not wrong, the only upgrade path you've got with X79/LGA2011 is the 4930K or 4960X and you're probably not going to fork out the cost of those down the line. The next chipset will be X99/LGA2011-3 and current LGA2011 CPUs will not be compatible with it.

The RM-650 is fully modular and will serve you well unless you decide to go multi-GPU. Stick with the RM-850 if you think you might go down that route in future. Also, check the wishlist in the edit above.

EDIT:

NCIX ship to Australia, but the shipping fees are killer, even with package forwarding. More importantly, you don't get warranty on products bought overseas unless they specifically state it's global. If you do pay for RMA protection with the package forwarder, it'll take longer to process the RMA and that's on top of the longer delivery times from the US/Canada to Australia in the first place.

32GB of RAM for gaming is absolute overkill. Hell, 16GB is overkill for a machine dedicated to only gaming though if you're going to use it as a general purpose workstation with gaming thrown in the mix, it's not bad to have.

 

That changes everything. That sort of workload benefits immensely from hyper-threading and extra cores, necessitating sticking with X79/LGA2011 if you want absolute performance (if you're willing to pay, that is). If you are willing to pay for a 4930K or higher, there's still the problem of the motherboards not supporting it out of the box (they need their UEFI updated to support Ivy Bridge-E, PCCG charge $25 to do this for you).

If you do this for a living, I suggest you go up to the 4930K/X79 motherboard combo, otherwise go with a 4770K/Z87 motherboard.

 

Just a comment, but when I was looking to buy a new PSU I read... somewhere (jonnyguru? spcr? not sure) that Corsair quality hasn't been as good recently - I'd advise you to go with a seasonic psu like this one http://www.pccasegear.com/index.php?main_page=product_info&cPath=15_972&products_id=22701 The wattage should be fine even if you go sli in future, but you can buy larger or some other thing if you want.

 

All Corsair AX (not AXi) below 1200W and TXv2 are made by Seasonic.