While I understand the effort Extremity. There's some things I'm going to have to criticize that shouldn't be a choice and just some added thoughts.
PSU: Rosewill Photon's OEM is Sirfa (formerly Sirtec before it broke off).
They are improving, but they're still not that consistent or great in comparison to other OEMs like SeaSonic, Super Flower, Delta and Flextronics. Even CWT is better than them.
Now, why I say this is because the PSU is one of the most important parts in your system and when you can get one for the same or less price but better quality it's a bit of a no brainer to go for the better.
AUD prices, but I'd be more willing to go with something like this.
http://au.pcpartpicker.com/part/xfx-...ply-p1750bbefx
Platform is a SeaSonic G series which is a very good platform.
Also very hard pressed to find Rosewill Brands in AU it seems.
Case is partially a personal preference. I'm not going to say don't get a Full ATX, but just realize that it's huuuuugeeee.
There are functionality with cases like HDD/SSD slots/cages, sound dampening material, radiator/fan mounting places, dust filters, and so on.
Aesthetics is whatever floats your boat.
SSD is a tad odd one. Mushkin isn't a bad company, but their SSDs aren't as great compared to the ones at the same price. You're also hard pressed to find Mushkin in AU it seems.
I'd go for this as opposed to it.
http://au.pcpartpicker.com/part/cruc...ct250bx100ssd1
http://anandtech.com/show/9144/cruci...1tb-ssd-review
The GPU however, whether you go for either the 390 or 970, that particular 970 is a reference cooler that's just white instead of the usual grey silverish one.
The reference design is not great and you'd rather go with a proper aftermarket cooler. I'm more partial to either Gigabyte's WindForce or Asus Strix cooler for after markets. For AMD in particular XFX is also a pretty good choice as they've been improving their cooler but also have a great warranty.
Just for general knowledge, or well sort of. The 970 is -not- a proper 4GB/256bit card. It's a 3.5GB/224bit + 0.5GB/32bit card. That 0.5GB portion can not be used along side the 3.5GB which is why when a game requires past that 3.5GB it becomes a stuttery mess. And bus size by itself isn't that useful of an information. You need both bus size and memory speed to get bandwidth.
HDD, do not ever get the black. There is no actual gain in the performance other than a tiny bit faster search rate. You're also paying 2x more for not a whole lot.
I'd go with either a WD Blue or a Seagate Barracuda for the most simple one.
In terms of RAM quantity. Evaluate how much you actually use and need. I personally need 16GBs, some don't even exceed 4GBs of usage. So look at what you do and go to task manager and see how much RAM and if you're hitting the upper limits of how much your system has, then you'd probably want to go for more.
I'm more partial to Crucial and G.skill for RAM.
Cooler. I'm more partial to air coolers due to noise and just don't need maintenance at all. High end air vs high end AIOs aren't that terribly different in performance. Contrary to what you said though, AIOs do need maintenance. Their pumps will eventually break due to the mechanical nature of it. I'm discounting fans because they both need em.
This is what I'm using atm, but it is monstrous. Probably can wait for the NH-D15S if you want the assymetrical one. Has better clearance overall, it does look kinda strange though.
http://au.pcpartpicker.com/part/noctua-cpu-cooler-nhd15
If you can get Cryorig H7/H5 somehow it's a great entry one, it's about $35/$47 USD I believe. It however like a lot of other stuff isn't available in AU according to PCPartpicker.
Be careful though and check what your case CPU clearance is in comparison to the coolers.
As for CPU and Motherboard, can you wait a month or so for the Skylake CPU, Haswell is end of life now.