After replacing my Onkyo 608 with a Less Powerful Harman Kardon, I have much better speakers.
The H-K made my RTI 4's much more dynamic, powerful sounding, cleaned up the sound, good for both music and movies. Movies are more dynamic and the dialogue is crystal clear. The sound of the H-K compared to the nicely built Onkyo, which I've never had a problem with, the sound difference is night and day in my system.
The H-K does not have all the bells and whistles that the Onkyo has but the sound is so much better.