upgrading pc soon

[MiRai]

I was reading around and people seem to recommend the graphics card to be, 4g gtx 670 thats in my budget range.

The 6xx series was the last generation cards and, in my opinion, gimped. You should probably be looking at the 7xx series now which are much more sexy.

What memory do I need, 16 gig I presume at least ? is more memory going to serve me greater as a 5 boxer ? Should I opt for 32 gig ?

You don't need 32GB unless you plan to run around 10 or more clients at once.

I see tonnes of different kinds of memory with things like 1866, 1600's etc. can you explain to me what differences are ?

It's the speed of the memory. I wouldn't put too much stock in those numbers because they're not really important, but you want at least 1600MHz (it will be difficult to find a computer with less than that).

Also how much of a difference does SSD make ?

In situations where there's a lot of things need to load they can be beneficial.

thats in my budget range

price is not important to me

Give us a roundabout number and we can list you components, but if you're not comfortable putting a computer together yourself (you mention your ex built your current machine), then it might be difficult trying to find something from the store that fits all the criteria w/o paying a little extra -- Especially since you're in Australia where computer hardware usually costs a little bit more than, say, state-side.