Got my PC in 2011. In August 2012 I got me a new PSU and Case and last month I bought an SSD for the OS and smaller programs. Planning on installing ARR on it.
1.0 was running ok for me and I think ARR will do just fine.
My specs:

AMD Phenom II X4 955
Asus M4A77T
PowerColor Radeon HD 6850
8GB Kingston RAM (started with 4GB)
be quiet! PURE POWER CM BQT L8-CM-630W (started with 450W *cough*)
120GB Samsung 840 Basic and 500GB WD Blue
Sharkoon T28 blue Case

Did I forget something? xD
Thinking of buying a new Graphics Card when I got some spare money. What do you think about a 7850? ATM they are around 20€ more than I paid for the 6850 back in 2011 (paid ~ 156€).