I scrapped my old rig because I had problems with the OS(Windows 7 Home Premium 64bit), or so I thought initially. It turned out to be a really strange case of SSD failure. The SSD was completely accessible via a dock, but it will not initialize the OS upon booting. But when I figured this out, I was already on my way towards a new setup.
There was nothing "wrong" with my old rig, it was great and it played everything maxed out without breaking a sweat. I ran a GTX 670 FTW along with my FX-8350, it was a very solid gaming platform. But unfortunately it was crippled by the SSD failure, and I decided to sell the parts and build a new rig. I guess you could say I tore down the house because the A/C broke.
To be honest, I was bored of the generic ATX tower. I wanted something a bit more uncommon and fun to play with, and I decided to go to a Mini-ITX platform. But since there aren't any Mini-ITX motherboards for my 8350, I had to ditch the 8350 as well. When this is all done and my new rig is built, on paper it would seem like I spent over $400 to gain maybe a 10% performance increase overall. But everything except for the graphics card and CPU cooler would be new, and very compact. You could say I'm doing this mostly for fun.