Congratulations!
That's an excellent choice. The Denon 4310 is a big favorite right now with some of the latest features, like Audyssey DSX (Dynamic Surround Expansion). Many people are happy with the 4310.
May I ask you how much you pay for it?
And I just have a gut feeling about what might have please you in it's sound quality. Could it have been the smoothness, the non-fatigue, the relaxed, the neutrality, the well balanced, the great bass, the easy midrange, and the sweet highs, that could have turn you on?
So overall, could it have been the cigar with the glass of Cognac lay back type of aural sound quality that did transport you? You must also remember what was the music recording that you were listening to?
And one last question. What were the speakers connected to it, that you listened to?
THY