Excerpt: I like the sound of my AVR-4520CI but am disappointed that the HDMI switcher in the refurbished unit does not work. I ended up purchasing a SC-77 after 6mo of troubleshooting without resolution. They should have just sent me a new one. Now it's just sitting in a box in the garage after spending $2k for it. I think the Denon sounds better than the Pioneer.
Excerpt: I've had my Denon 4520CI for over 1 year now, Nov-2012. Bought it locally from brick-n-mortar store AVIO in Michigan. It is used in my basement dedicated HT - dedicated room with 2 rows of seating for 8 people, prior I was using a 4308CI since 2008. The full suite of features and ability to manage my HT is key, this AVR delivers! Rock solid, I've had zero issues with this AVR and highly recommend it to anyone looking for top tier AVR to handle their HT needs.
Excerpt: I love the 4520!! The sound is superb, it just missing a few things that either older denon models had as well as lower denon models have. i.e..the ability to pause MP3's without having to completely stop and start over again. Also, the ability to rewind and fast forward streaming MP3's songs without going to the previous or next song. Another feature I could do on my old 4306 model was to pause streaming internet radio stations as well.