Sony is a good brand, but not the best.
Better brands that are relatively common include...
Harman/Kardon, Denon, Onkyo, Yamaha, and Pioneer Elite.
NAD is a Very good brand you probably haven't heard of, but you should get familiar with it.
Stepping up significantly from the usual, you might look at Bryston, Parasound, Anthem,
Outlaw Audio, Emotiva, Audio Control, Krell, Sherbourne, Rotel, McIntosh, Cary Audio,
Marantz, Classe, Sunfire, Arcam, and Lexicon.