Also not exactly a big sci-fi buff but...
I really enjoyed Snow Crash - at least the first two thirds of it, I think it ran out of steam a bit by the end.
Neuromancer and the other ones in the same series were good when I read them. Likewise John Wyndham.
Does Burroughs count as sci-fi? Obviously he's not new to you anyway but probably deserves a mention.
A Voyage to Arcturus is meant to be good and it's in my pile here so I could probably give you a better update in a week or two.
The Space Trilogy by CS Lewis seems to be name checked often but I've never got round to it.
A late 19th Century one (I think) is L'Eve Future by Villiers d'Isle Adam about building a perfect woman. Think that this book popularised (though didn't invent) the word android. Similarly there is Supermale by Jarry which is sort of sci-fi.
I've read some Machen that was pretty good. Not actually sci-fi as such now I think about it but apparently a huge influence on L*vecr*ft.
The Philip K Dick one that was made into a (good) film a year or so ago and is called, er, A Scanner Darkly. That's good.
HG Wells the Time Machine is another obvious one. In fact these are all obvious (anyone mentioned Jules Verne?) sorry. Um, The Island of Dr Moreau though it's a very long time since I read that. Which reminds me of The Invention of Morel by Casares which is inspired at least in title by the Wells book and in turn inspired Last Year at Marienbad I understand
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As for films, well, I'm just about to watch Zeta One and will report back afterwards.