Now I have my brother's old PC which has a 2GHz AMD Athlon 64 processor, 1GB RAM, and Saphire Radeon graphics with 256MB RAM but it's a bit crippled running XP Home and 32-bit Fedora Linux. I'll probably soon buy a solid state hard drive and possibly some better quality RAM.
I don't see the point of having an up to date PC, even an old PC is more than good enough for what I do. Now I upgrade when my current hardware breaks or I can get hold of second hand stuff for free/cheap.