Dynaudio C-1 or Harbeth-7-es-III

As a Dynaudio C1 owner I have been following this thread with interest. I may be moving in the near future to a house that has a smaller living room, which will necessitate placing the speakers to about 18" max from the rear wall (currently my C1's are 36" from rear wall). I have been more than a little curious about the Harbeth Compact 7es3. In the specifications listed on Harbeth's website, it says "overall response optimized for use away from walls".
For those who own or are familiar with the 7es3, what have you found to be the needed distance from the rear wall?

I scaned part of SHL5 the manual,which shows how to place speakers from side walls and front wall, i think recommendation for 7es is very similar .Manual

Its best to have some space in between the walls & the harbeths.
Too close to the walls can sometimes be a bit too bloaty or fullsome.

If you need to put your C7s near a wall, it's not really a problem. I have my C7ES3s about a foot from a wall because of necessity. If you put some thick padding on the wall behind the speakers the sound will be improved enormously.