Your experience with Thiel 3.6

@hifi28 , Ideally the listening position would indeed be 3 meters / 10’, but 8-12 ‘ will work just fine. The set up would ideally be roughly an equilateral triangle between listeners and each speaker.

 Your concerns regarding wall reflections directly behind your ears is well taken. However, if possible, the John Dunlavy approach to room treatment consisting of thick foam approximately 2” thick and covered in natural wool and placed directly on the wall behind the listening position can tame those reflections. 
 There are numerous advantages for such placement. If at all possible, it might be worth a try.
 

@hifi28, Is there any chance you might be able to place them facing the long wall?

Jcatral14, actually I think that the Thiels are unforgiving with regard to associated equipment. As for placement, I think they are unique in that they will reward you if you give them room and attention but can be forgiving of less than ideal placement. I know that sounds contradictory, but, it's true. Some other speakers fall apart(sonicaly not literaly) when not place just so. Thiels recommends a minimum of 1 foot behind, 3 feet from side walls, 8 feet beteen each other and 8 feet from the listener. You will be greatly rewarded if you can get them 3 feet from the rear wall, 5 feet from side walls, 10 feet apart and 10 feet from the listener. After that the big consideration is how much bass your room can handle. You can probably fit the 3.6's but the 2.3's or 2.4's are worthy of consideration.

Jcatral14, I think you'll fine the Thiels are a lot more forgiving than any panel speaker with regards to distance from the back wall.

While not my favorite combination, it's a wise one. One of the better amp values that works well with Thiels. At this price point you might want to consider the bigger solid state c-j's as well. I haven't heard the latest offerings from c-j yet (I plan to do so as soon as possible), but, they are reputed to be tighter in the bass region than their previous offerings.