Hey guys!

I was wondering if i could get some suggestions on parts for a new desktop. My current rig is starting to age, and I have the feeling that soon parts are going to start to fail on me.
I recently upgraded the graphics card from an Asus 5770 to a Sapphire 7850, which is a really great card which is being held back by slow RAM, an aging CPU and a sluggish harddrive, and also it has very little airflow because of an overcrowded case.

If anyone could give a few pointers on brands and models for a new mobo, HDD and the rest that would be really helpful!

I am building with the 7850 in mind, and would like to crossfire it after some time has passed. I live in New Zealand, do not have an enormous budget and would like parts pretty proportional to the card.

Any help is appreciated, and questions are welcome