Underrated Science Fiction?

The most underrated science fiction movies, according to Marginal Revolution:

1. Primer - Hmm, seems interesting, but super indie.
2. Aeon Flux - Underrated? Besides Theron in latex, seems like the rest is irredeemable.
3. Body Snatchers - 1990s goodness!
4. Tron - "Soon the ultimate tool will become the ultimate enemy!" -- there is hope for me yet.
5. Sleeper - WTF? I have never liked Woody Allen.
6. eXistenZ - Weak "science fiction" framework for Jennifer Jason Leigh to get naughty.
7. A Boy and His Dog - "A rather kinky tale of survival." O RLY?
8. Enemy Mine - "Brothers because they dared to be." I don't think it works that way.
9. Gattaca - I like it to, but I don't think it is underrated, and if it was, surely it beats Aeon Flux.
10. Silent Running - "Meet the almost human drones..." Errrr....

All in all, that list sucks. He tries to redeem himself with some additions:

"My picks would have been Mission to Mars and Titan A.E. Sunshine is also quite good and not so well known. At times I regard What Dreams May Come as science fiction."

Titan A.E. What a turd.