Bookshelf speakers for a NAD C368 integrated amp

FWIW, I am running a NAD 368 BluOS  with Buchardt Audio S300’s in my living room. 
Took them a while to break in but I am enjoying the combo. Not too bright or too laid back, just about right to my 59 year old ears. 
I have them off the front wall by only 12 to 14” and don’t seem to have any problems. At least at the volumes I’m running them at.  You could tame the port a bit with foam if it was a problem. 
Of course YMMV. 
Good luck with your search. 

Thanks for all your input. I will research all suggestions.

I owned the C368 briefly.  Given my experience with this integrated amp (slightly dry; cooler side of neutral), I would suggest a used pair of Sonus Faber monitors.

Thanks Vingard,

heard good old things about Sonus Faber, also checking Wharfedale Reva speakers.

I've heard the C368 on a pair of LS50's and would not recommend it.
The PSB X2T are a perfect match for your amp and yes the new Alphas will also work great as well.

Monitor Audio or Dali might be worth looking into as well at that price point...