Upgraded to AMD 486 DX4/100 PC by yours truly
Upgraded to Intel Pentium 200Mhz by yours trule
IBM ThinkPad Model A22m (one of the best laptops I've ever owned)
12" Powerbook G4 (1Ghz)
17" Macbook Pro (Intel Core 2 Duo)
15" Macbook Pro (quad i7)
I know from reading the stories about how they were built. As a programmer, these stories are very valueable. The teach and inspire. I highly recommend the book Revolution in the Valley. It's a collection of stories about the creation of the Macintosh.