It depends on what you mean by "good". I prefer lighter reads that are entertaining. I also like some harder science fiction, but other times it just has too much theoretical physics for me. There's other stuff that I just pass on because it looks like you need to be on LSD to enjoy it.
One thing about the old stuff is the authors had no clue about personal computers, thumb drives, and cell phones.
One of my favorites is Mutineer's Moon and the series by David Weber. I readd this might become a movie.
Another is Starship Troopers by Robert Heinlein (the movie sucked).
David Weber's "March to the ..." series had a good audio torrent in the past.
I generally like most of David Weber's stuff, but after the first several books, they did become repetitive, especially with some series overlapping. They also started getting very long with hundreds of characters (some who die right after spending 25 pages learning everything about them). So most Weber I tend to speed read these days and just skip paragraph after paragraph of exposition, if that's the correct term.
I also liked all the Babylon 5 novels, but if you didn't like the TV show then you probably won't like the books (that goes for Star Trek and Star Wars, too).
David Drakes "Reaches" series. It's been a while, but I think these remind me of Elite.
S.M. Stirlings "The General" series.
For more of a comedic or adventurous experience, try the "Phule" series and the "Myth" series by Robert Asprin.
For something a little harder, try:
The "Rama" series by Arthur C Clarke.
The "Heechee Saga" by Frederik Pohl.
The "Uplift" series by David Brin.
The "Galactic Center" series by Gregory Benford.