I'm typing this from my ThinkPad T40.  That's the main PC I use.  I like it because it's not super fast so I don't get too far ahead of what others are using and it's portable.

But behind me here is my Dell G4 which is a 3.6 Ghz monster with 2 gigs of RAM and 400 gigs of hard drive space, ATI X800 Pro.  That's my gaming rig.  Next to it I have a 2.8 Ghz machine that I use Multiplicty on (unreleased Stardock product we're working on that you can find here https://www.stardock.com/products/multiplicity/) to control both at once.