No shop... just an audio lover 
In Peshawar go to shop "Pioneer", on the back of Deans plaza (where the 3 roads meet). The shop owner is Fyaz... Ask him to install personally... His shagirds are not good!
Class D is ok for normal installs... Highend brands like McIntosh, Brax, Sinfoni, Steg, PHD, Luxman... dont make Class D and there is a reason!
But Class D is good for small cars with electrical limitations...