Bookshelf speakers for a NAD C368 integrated amp


Recently purchased a NAD C368/BluOS integrated amp and looking for bookshelf speakers that are a good match. Current speakers are Celestion SL6si that I have had for ~ 30 years which are acoustic suspension and very low sensitivity. 
Music listening ranges from the likes Mark Knopfler to Nora Jones, etc... I’m 69 and tired enough, so nothing too fatiguing but not too laid back. Any suggestions appreciated but no more then $1200. a pair.

thanks, 
ticman
Check out the Monitor Audio Silver line.  Good bass extension.  12" from wall will not be ideal but should not be the end of the world with those either.  
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. 
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.