Started noticing my RAM usage is getting rather high in games recently, 6.5gb etc.
Although that's within 8gb I remember back in the day playing with 4gb and games going to 3gb. However when I upgraded to 8gb the games straight away went to 4gb (both times x64). Basically Windows knows what to do with your RAM and in some situations would probably hit 8gb now if you upgraded to 16gb.
For this reason I'm going to upgrade to 16gb in the near future as it feels like within the next year 8gb is going to be pushed hard in some games.
I do agree though, I'd rather spend the money on CPU/GPU. Extra RAM is always a good future upgrade option, definitely not needed on day 1!