Iain M Banks - Consider Phlebas, Use of Weapons, Palyer of Games, THe Algebreist...any of them really.
Ian McDonald - River of Gods, Brasyl
Phillip K Dick - Anything at all by this guy
If you can handle the old writing style, Ray Bradbury, particularly his short stories, though Farenheit 451 is good.
Isaac Asimov, the Foundation trilogy
Frank Herbert, the Dune series
Get through that lot then come back for more. I'm dead jealous actually - your in for a real treat.