And for newer stuff, Richard K Morgan's Altered Carbon (2003) and 2 sequels really hit the spot. It's hard to find good gritty cyberpunk these days.

And it's not that old works are bad, just that some of the tech misses distract and take you out of the atmosphere sometimes. Like on Star Trek, when they have to physically deliver email to people on holodiscs.

I'd also note that Asimov's Robot series are great if you like hardboiled type stuff - not cyberpunk, but has a slightly similar ambiance.