Several points to ponder
1) No speaker is "accurate" in the sense of the real world. They are designed according to their designers idea of "accurate". That's why they all sound different.
2) What DOES your onkyo sound like? I'm of the belief that the speaker/room interaction determines at least 99% of what you hear. Ther receiver is far, far down the list in importance.
3) Ain't no such thing as perfect. You're gonna have to compromise. Get used to it.
4) Your ears, and your ears alone, are the final arbitrator in what sounds good to you.
5) How much do you want to/are prepared to spend? Answer that and maybe people will offer their "opinions" on what they like. Who knows? You may like them as well. ...or maybe not.
...remember, your speakers are the main determining factor in now "good" your system sounds. Good speakers with a mediocre amp will still sound good. Mediocre speakers with a great amp will still sound mediocre.