The best I ever sounded was through a component rig with one of the 80's Yamaha P2200 amps; I forget the model #, but the big one with the VU meters.
These things were BUILT. We did a house system install in a club that later burned down. We retrieved the rack with 4 Yamaha power amps, and three of them went on to live long (albeit always with a slight smoke smell even after all the cleaning we could do), productive lives afterwards. In those days, all the likely suspects (Crown, Crest, QSC, etc.) were all players, but none were built as well as the P-Series Yamahas though they could be very good, and none of them were as anvil-reliable in all cases.
I would not hesitate to buy any of their current offerings, IF I could walk away from lightweight Class D rigs and could go back to hauling Big Iron.