Times have changed though foetz, and so have the answers. I think this thread is worthy of the test of time and continually being updated.
I was thinking about my first Silicon Graphics, a Personal Iris (Brown) followed by an Indigo with Elan Graphics, but for the life of me I can't recall why I fell in love with SGI. I did work with them for a period, but can't recall which came first. I worked with them in the 02 era, but did I buy the PI because of that? I just can't recall. I do recall though having a lot of old SUN stuff at the time, even the i386[?], so I may have been just lucky and bought one for no real reason.
Actually now I think about it, I did C, C++ cert on Indy so I must have fallen for it before. It wasn't Jurassic Park, I know that for sure.