I think you need to mention your budget as well as your listening preferences as otherwise you could get thousands of names thrown at you. For excellent imaging and a wide soundstage, I enjoy the Mordaunt-Short Performance 6 speakers (around $5k new) but there are plenty of excellent speakers that will meet your needs at a significantly lower budget. Look at budget models from KEF, Monitor Audio and Epos for example.
Speakers that work well with Onkyo M-588F/P-388F
I was wondering if anyone could suggest a high-quality pair of speakers that would work well with the Onkyo M-588F/P-388F combination running in balanced mode. I have a fairly large listening room - 15'W * 25'L * 9H. I would want them to deliver a full-range response but still have the ability to deliver 3D holographic imaging and accurate soundstaging. Thanks in advance.