The Matrix is nowhere near as good as IMDB's fan ratings would have one believe. The special effects were amazing for it's time, but the storyline is nothing special. I don't think it deserves a spot in the top 250, much less the top 20.
Terminator 2 (ranked 36 in IMDB's top 250) is good, not great, and it's definitely not better than The Terminator (ranked 172). The annoying kid actors, boy and his cyborg storyline and advanced special effects make it feel a little too homogenized for me. Top that off with an antagonist that is technically superior, yet far less menacing.