Wow, that PCmark2004 score whips my top system. Sandra CPU score kicks butt too. From my experience, if you can run PCmark2004, you are reasonably stable, since it's a tough benchmark.
Also, running over DDR2-900 speed is impressive, but I bet if you drop the ratio down to 1:1 and lowered timings, you'd actually score higher on some of those benchies.
This is making me consider buying a Swiftech socket LGA775 water block and i955X mobo (Asus or Abit) in order to take one of these dual cores for a little spin.
Let's see how I can sell this idea with the g/f, "Honey, Because I love you, I'm giving you my good backup computer since yours is getting sort of old. Oh yeah, I'm buying $600 of new components for me too."