If you are unhappy with the sound you are getting, a much better investment would be new speakers and/or acoustic treatments in your listening room. There has not been any significant new technology in amplifiers for a long time.
Perhaps if you are looking for a receiver/integrated amp that has built in digital streaming apps and networking capabilities it would make sense to update your receiver.
Perhaps if you are looking for a receiver/integrated amp that has built in digital streaming apps and networking capabilities it would make sense to update your receiver.