Hrm. Ignoring everything older than a K6 I went K6-2 --> Pentium 3 --> Pentium 4 --> K7 (and 2 other times) --> C2D --> Atom --> K10.5 (x6) Some of the machines I owned at the same time, and I have owned way too many K7 machines, the last of which I went w/ instead of splurging on a K8, which I later regretted quite a bit. Was planning on upgrading to BD just to play with, if nothing else, but I probably won't now, unless MC releases a cheap bundle, and/or it turns out the FX-4 are unlockable.