The Marantz stuff has excellent design and build quality. Very good power supplies and Marantz is the only receiver that has a fully discrete analog output stage. The sound will be very strong and full. However, the Marantz is voiced on the warm side, so you will have soft and rolled off highs when compared to other receivers. This is the Marantz voicing and some may like it. I was able to test the latest Marantz processor in my system and it was very good, but definitely warm.
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The Denon will be a more conventional receiver "sound". Another option to look at is the Anthem MRX720 or MRX1120 receivers. The Anthem will probably be about the highest resolution sound quality for a receiver. This is excellent if you want the HT movie excitement. These Anthem receivers could come across just a little bit bright sounding at times, but they are excellent for high resolution and crystal clear movie sound.
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The Denon will be a more conventional receiver "sound". Another option to look at is the Anthem MRX720 or MRX1120 receivers. The Anthem will probably be about the highest resolution sound quality for a receiver. This is excellent if you want the HT movie excitement. These Anthem receivers could come across just a little bit bright sounding at times, but they are excellent for high resolution and crystal clear movie sound.