Qln, Joseph Audio, Audiovector, Marten, or Canton...?

If disappearing speakers and a wide and deep soundstage are your 1st concerns, QLN FTW!

I have only heard JA Perspective 2 on your list.  I can't recall the electronics and cabling used but they sounded very nice.

I am a Thiel guy so they were definitely in that vein - clear, open, and utterly transparent.  

My preference would be the Spendor D9.2.  

Clarity, refinement, superb imaging, efficiency and microdynamic speed.  Best feature is a bottom firing flared port that has sub bass extension that mimics a transmission line.  

Of the ones on your list I have not heard the Cantons but unfortunately have quibbles with certain sound qualities of each of the remaining.  

Thanks for all the input so far. @avanti1960 I would love to hear your quibbles.

I've recently been looking for speakers with WAF very strong constraints.

My first selection included Spendor 9.2, Wharfedale Elysian 4, Audiovector R3 Arreté and Marten Oscar Trio.

I mainly listen to classical music. I listened to these speakers with Accuphase E-380 or E-650.

My clear selection was Marten. They are very neutral, the stage was stounding and they tend to disappear; I really forgot that I was analyzing equipment and went just into enjoying the music.

I listened to Marten Oscar Trio also with Canor Audio 1.20: astounding. The demo room of the retailer and the rest of the equipment was really, really good but I fell in love with the speakers and the amplifier.

Ilistened also the Oscar Duo but they did not like me like the Trio, at all.