Will you be reusing peripherals from an older system ? And if so what resolution monitor ?
1. The think I try and highlight when doing initial build is pay less attention to things that are easily upgraded and more to those that are not. For example, not recommended to get 2 x 4Gb now as adding a second set of 2 x 4 GB later is a risky alternative. So best to get 2 x 8B from the getgo is always the best route.... but that's gonna cost you an extra $20.
https://au.pcpartpicker.com/product...gb-2-x-8-gb-ddr4-3000-memory-bls2k8g4d30besbk
2. Micro ATX sometimes has a cost premium over ATX and often the Audio, LAN and other subsytems are compromised. For a box that will be used primarily for gaming, we recommend boards with AC 1220 audio subsystem. Unfortunatly, while in US, this might att $10 or $15, down under it can add $80 or so.
3. Of course an SSD is going to add a significant cost, usually $125 or more ... this is an item that is very easy to add later. With a 1 TB HD, that's gong to bring you to $180 or more. With games approaching a 100 GB foot print these days, that 500 GB SSD doesn't hold many games. Everything else goes on the HD which is slow. The SSHD is over 50% faster in gaming than a HD . a 1 TB drive will costs ya $85 down under, about $30 more than a HD. So ...
Option A - 500Gb SSD + 1TB SSHD will add $30 to your build cost for same capacity.
Option B - 500Gb SSD + 2TB SSHD will add $80 to your build cost for doube capacity.
Option C - Skip the 500Gb SSD for now, gran the 2 TB SSHD and add the SSD when budget allows (next B'day, XMas, chores whatever). This puts $45 back in your pocket, allowing you to gran that 2 x 8GB of RAM now and still have $20 left in ya pocket.
That extra $20 would also pay for a GFX card alternative to consider ... the 1060 6GB which may be of interest for various reasons ,,, figures below based upon MSI 580 mech and MSI 1060 Gaming
a) If you will use Afterburner to tweak your card speed a a bit, the reference 580 scores a 98 to 97 edge over the 1060 ... if you use AB to tweak the cards speeds, as most forum users do, you can boost the 580s score to110.4 whereas the 1060 6 GB will get to 114.7 so it is marginally (4%) faster wen tweaked.
b) The MSI 1060 uses 135 watts in peak Gaming, the 580 Mech is 197 .... 46% more on ya electric bill. At 20.5 cents a kw-hr (average Aussie rate) and 30 hours of gaming a week, that's $22.87 a year
4. Normally I'd say that ya might wanna invest an extra few bucks in a Mobo that doesn't come with a Realtek ALC887 audio chipset. Those that do the 1st person combat tell me that the 'sound radar" that allows you to detect source direction of fire "makes all the difference" ... however, down under, instead of the $10 extra we see, last time I looked at Aussie sources it was like 480.