I'll toss in my recent favorite space opera: the Polity series by Neal Asher. Similar to Banks in that it has governing AIs, but less omniscient; good adventure stories, with a dash of horror in original hostile species, sentient and otherwise.
I was particularly struck by the concepts that came from the Atkins character, as the sole entity in the universe's military. The magnificent display of unbelievable power, not as planet cracking explosives, but weapons so precise that individual neurons could be severed from orbit, altering the course of entire conflicts. And the idea of the weaponry and strategy, though controlled by godlike machine minds, still needed the ok of a person to do the precision strike.
The only real weakness I felt was the Daphne character, she was flat, uninteresting and almost misogynistic in her treatment as an unbelievable ignorant and foolish female character. I found myself aggravated during her sections of the work, this stupid character in the midst of such magnificently crafted, almost baroque, prose and ideas.
Golden Age raises some real philosophical questions, as good mind-expanding SF should. Suppose you have an adversary in some endeavor, and you have the technology to perfectly simulate your adversary's mind and predict what he will do. Does that simulation have consciousness? Does it have civil rights? What if it's forked? Very interesting stuff, grounded in real science (no FTL travel.)