VR PC-BUILD :
dreamalittle :
spending less on the mobo and more on the GPU is a fair thing to say. but ditching the SSD for a better GPU? awful idea imo. if anything he should just run a junk GPU until he can put the 1070/1080 in there.
That is not true price wise as he can spend $50-100 to throw in a SSD after few months. But to upgrade GPU he will be needing $831 which is very high compared to $100 and even if he sells his $500 GPU he will get $400 or less and he has to spend $431 more to get that big upgrade. In old days before SSDs came into existence we used HDDs to install OS and all other stuff so it should be no problem to adjust for a short bit when you are getting beast GPU
unfortunately the GTX 1080 is most likely going to be ~ $1100 or 1200 AUD. so the 970 at $500AUD might sound awful but it's more than HALF the price of the 1080. we don't know who much 1070 will be, probably 600-700AUD if we are lucky. either way, even the $500 970 puts him over his original budget of $1700AUD (or less).
about the SSD, i still think it's a horrific idea to spend $1500AUD+ and have a computer running a hard drive. not to mention the complete hassle of migrating the OS and apps across because he WILL upgrade a HDD. whereas running a cheap GPU until he buys a 1070 for example will be a much nicer upgrade path.