A Duron 1300+ was my first AMD chip. Upgraded it to an XP 2000+ a few months later for fairly cheap. That was just about the time that P4's were starting to catch up and overtake the XP's in performance.
My first ever computer was a Compaq with an AMD K6-2 at 350 MHz and 128 MB RAM. The first computer I built myself I bought a AMD Athlon XP 1600+ that I overclocked to a "2100+" stably, ran for years with no problems.
Why can't you just use a mouse or touchpad to minimize/maximize or whatever? seems quicker to me. you can't do everything with the keyboard.
I also use the keyboard as much as possible, especially on the MBP. Both the Chief and I would probably be faster than you with us using keyboard shortcuts and you using the mouse. I love the integrated search that OS X Tiger (spotlight) and Vista (don't know what they called it) introduced. I want to open Disk Utility to burn a iso image. I click on the HD icon, go into the Applications folder, then the Utilities folder, then double click the Disk Utility icon. Or, using Spotlight, it would just be Command + Space, type "di" and hit enter. Much quicker.