The most placement forgiving planar speaker?

Based on my experience I would say Sound-Lab M-1.

Unless you listen in a tiny space, they will work in your room. Bonus is they perform wonderfully with a wide variety of amps and throw a sweet spot that is "room sized."

In other words, you have to work hard to find a spot where they don't image and sound good :^).

Amazing how Albert's explanation perfectly describes my now 6-month experience with the same-sized A1's. In my room, there is a little bass hump if they are too close to the back wall. Closeness to side walls does not seem to be much of a factor. I have a wonderfully huge sweet spot no matter where I am as I walk across the back of the room. The Magnepan 3.5's that I owned before had a sweet spot of only a couple feet with a comparable 7-8' distance back from the speakers.

The Soundlab is an amazing speaker, if you can afford $7000.00, what about Eminent Technology LFT VIIIA?, placement can be as close as 2 ft from back wall and side wall is not critical, Bruce Thigpen (owner & designer) is about as nice as they come, give him a call and try a 30 day in home audition, at less than $2000 with Sound Anchor stands its a no-brainer.....and you will be hard pressed to find anyone who knocks these speakers.

I found that my Maggie 1.6's were pretty easy to place. Just need about 2 feet or greater from the back and side walls, if I recall. And as has been previously stated, I wouldn't try to stuff them in a small room.