Proto,

I suggest Oscar Peterson: We Get Requests.

This is an exceptionally well-recorded CD. On my system, the soundstage extends well-beyond the speaker boundaries in stereo mode and sounds even "larger" in PLIIx. When in PLIIx, I like listening to this one with a phantom center.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated