I got my amp built by a good audio engineer who's been doing this for the last 18 years. He specializes in stereo amps only. and he's a strong believer in toroidals. And no, it is not a Class A amp. Its a Class AB amp.

Incidentally, I've solved the problem of leakage by putting a thick grounding wire to the body of the amp and the PCB itself. Apparently, the house wiring is not so good. So no more tingling cheeks!!