First computer was an Apple //c. 66 MHz? Bah, young whippersnappers. 1.020 MHz. (1.023 is the max speed, but every 65 cycles, the video system inserts a long cycle.) 128 kiB RAM. Single 140 kiB floppy drive. Aww yeah.
First computer I paid for... hrm. I want to say it was a ThinkPad R51e (before then, I used lots of hand-me-down computers), 1.4 GHz Celeron M, I think 768 megs of RAM. Nothing special.