At 80 wpc, the NAD 356 is a good amp that is capable of driving literally hundreds of speakers, 8 or 4 Ohms, from dozens of manufacturers. They would all sound good depending on a myriad of other factors though. This doesn't help you much, does it?
So what sounds good to you? What type of sound are you looking for? Do you have a preference in tweeter type? Soft or hard domes? Or maybe ribbons. How about a horn? Do you like your speakers to be highly accurate and revealing? Maybe more forward and lively? Or smooth and laid back? What about your room? How big? Lots of hard or reflective surfaces? Looking for floor standers or bookshelf? Finally about budget?
More specifics would be needed to give you a meaningful reply.
So what sounds good to you? What type of sound are you looking for? Do you have a preference in tweeter type? Soft or hard domes? Or maybe ribbons. How about a horn? Do you like your speakers to be highly accurate and revealing? Maybe more forward and lively? Or smooth and laid back? What about your room? How big? Lots of hard or reflective surfaces? Looking for floor standers or bookshelf? Finally about budget?
More specifics would be needed to give you a meaningful reply.