Speakers good for close to wall placement

This reminds me of something.  Among my nearly half century of owning B&W's, I had tall electrostatic panels speakers for 25 years.  Instead of placing them near a wall, I removed a section of the wall and used the speakers in two different rooms.  The sound was certainly clean and crisp from the upper bass to the mid-range, where 'stats really shine.  I had originally done this for the early, wood framed Magnepans, but those speakers were not really good at anything, except for sounding like Bose 901's with an even worse head cold than they had. 

The whole speakers close to the wall issue is GREATLY misunderstood and fraught with a ton of misinformation. 
  You need to consider what is going on to understand the situation as a whole. 
1) When you place a speaker close to any room boundary you reinforce bass response AND excite room nodes. This is a major reason why people like small speakers in tight spaces close to walls. This is easily fixed with bass traps  but many will never spend the money and never get true full potential from their setup.

2) Walls create reflections and even the back of a speaker cabinet radiates sound, sound that is not necessarily pleasing. Don't believe me, get behind a speaker box and put your ear near the cabinet. It's not pretty and early reflections of this sort are not pretty. Solution is to put absorbers directly behind speakers or better yet a QRD diffusor.  

The speaker and room should be considered as a unit and integration is paramount. I have 3 VERY large speaker systems that traditional misinformation says they only sound good several feet away from the walls however I can place the fronts 3 feet from the rear wall with no issues being that I have my rear wall done in Skyline QRD's and proper bass traps tuned for a low RT60. 

The popularity of small speakers with tiny woofers is undoubtedly due to the reluctance to properly treat a room's nodes for full range capable speakers and smaller speakers have less surface to radiate objectionable rear waves. 

The only speakers that really need to be spaced a but from rear walls are electrostats which have membrane issues when too close to a boundary wall. 

I remember being shocked by the Snell speakers that were designed to go flat against a rear wall and taking the rear early reflection completely out of the equation however the spaced approach with a diffusor gives a soundstage of epic scale and more enjoyable experience.

So treat you room first and then worry less about speaker selection.

If you are into DIY, you might want to consider Curt Campbell's Halcyons. These are 22 inches deep but intended to be right up against the front wall 2-3 inches.  They are bigger than they look, and sound it.  Build thread here:  https://www.diyaudio.com/forums/multi-way/349255-curt-campbells-halcyon-build-thread.html

I will echo the recommendation to seriously consider the Larsen loudspeakers.  They are the only loudspeaker I've ever heard that are engineered to be put up, flat against a wall.  Doing so makes them much more furniture and decoration friendly, if that's an issue for  you.   If it is a serious requirement, then the Larsen really is a great choice.    I’ve heard them and agree that they image well, though to me, they sounded rather 2 dimensional than 3 dimensional. The Larsen 8 is about $7000 and you’re not likely to find them on the used market. You don’t say what amplification you’re planning on using, but that will probably add another $2000 or more to your system cost.

You mention using an integrated amp, which suggests that space is a problem for you. Otherwise separate preamp and power amp gives you many more choices.

***IF*** you can work with a loudspeaker than can sit about 6 to 12 inches from the back wall, then the recommendation for the Dutch & Dutch 8c is one you would do well to take seriously seeing as how you’re looking to purchase both your loudspeakers and your amplification. The D&D 8c retails at $12k, but can be found on the used market at about $9k, which puts it even with the Larsen and whatever integrated amp you might choose.

I’ve also heard the Dutch & Dutch 8c and they are nothing short of astonishing. One of the very, VERY best loudspeakers you’ll ever hear. Absolutely extraordinary. They are a fully engineered system with built-in amplification, DSP and controlled directivity. You don’t run them butt up against the wall, but typically about a 6 to 12 inches away. Once you get them in place, you tweak the DSP to account for the wall spacing and it works with the wall, not in spite of it. Exceptional deep end. And the imaging!!!! O-M-G!!! I don’t know if I’ve ever heard a loudspeaker even come close to what the D&D 8c can do. Truly incredible.

You don’t say what you’re planning to use for a source. If you’re one of the people who mostly listens to streaming sources like Tidal, or even just plays digital material from a music server or computer, then all you have to do is run a network cable to the D&D 8c and you’re done. No preamp. No intergrated amp. Just your laptop and a network cable. Talk about a minimalist setup!

If you can find your way to auditioning the D&D 8c, you’ll be truly amazed.

I’ve used Vandersteen Treo CT’s within 12”of the wall and they sound great, probably because the port is on the bottom of the speakers.  The point about using absorption or diffusion behind the speakers is a good one.