Do we have a PC hardware/upgrade resource thread?

I was searching and didn't find any threads that people can use as a resource/advice when upgrading their PC. If I fail at searching is there a link someonce could post?
If I don't fail at searching 1) Would a thread like this be a good idea?
2) If so does any PC master race all knowing god want to head up such a noble cause?

Basically what I'm thinking is people will post their specs seeking advice on where to start upgrading, what will give them the greatest impact for the least amount of money/effort, etc.