Would center channel benefit audio only room?

I'd refine your speaker placement. Most full range, high end loudspeakers will do what you wish.

Refining speaker placement seems like a reasonable place to start before recommending purchasing another speaker and more electronics. It takes only five minutes looking at the Virtual Systems to see that it's not uncommon for speakers to be positioned improperly. More than a few people don't (or can't) position their speakers in a way that will create a correct stereo image.

I have a fireplace in the middle of my front wall with the speakers on either side. The fireplace has no effect on my perception of the size or proportion of the stereo image, which is life size.

Orpheus10, at what decibel level do you listen, and how far from the speakers do you sit?

Orpheus10, are you interested in any options/solutions other than adding a center channel speaker?

Tvad, all options are open that will provide a solution.
Orpheus10 (Threads | Answers)

Great.

At what decibel level do you listen? Can you have a normal conversation while the music is playing? Is your conversation louder than the music or do you have to speak loudly to be heard?

How far from the speakers do you sit?

Orpheus10, I've now asked you twice how loudly you listen and how far from the speakers you sit.

For some reason, you don't answer, so now I'm in agreement with some of the others in this thread who consider participation here a waste of time.

Bye.