For one of my classes at university, we read three dystopian novels and then discussed their relations to modern philosophy. The conversations were actually really interesting, and I enjoyed the class enough that I wanted to read more dystopian novels to see what other strange visions of the future authors from decades ago had, or perhaps even more recent works, ie The Hunger Games. As you can see from that last example, the themes behind them don't need to be as dominant as Orwell's were, or nearly as philosophical and satirical.
Some dystopian novels I've read:
The Hunger Games trilogy
Brave New World
I'd love any other suggestions, and for those of you who haven't read Vonnegut's Player Piano, which would be understandable since it's certainly not his most famous work, I strongly encourage you to read it. Best satirical writing I've read in a while, and the themes are extremely relevant today, as they deal primarily with how you handle unemployment when manufacturing declines sharply due to technology. Amazing book.