Originally Posted by jevans64
As far as the upgraded 5308ci vs. a 4520ci. You are only missing the HDMI 1.4 stuff, like Ethernet over HDMI and ARC, neither of which matter if everything is going into the Denon. The 5308ci will only do 9.3 vs. 11.2 for the 4520ci. No 4K passthrough or upconvert as well. I don't have room for Wide speakers and I don't care about 4K.
One thing you mentioned is incorrect. Remember items you see listed for HDMI 1.4 (and 1.4a, 1.4b) are a series optional capabilities. So everything that mentions HDMI 1.4 doesn't necessarily have *all* of 1.4.
The entire industry seems to have passed on Ethernet over HDMI. I know of no components that include HDMI over Ethernet probably because the HDMI chipset manufacturer passed over the capability. Denon really doesn't directly choose how HDMI is implemented. Instead Denon chooses which HDMI chipset to use. The manufacturer of the chipset choses what to include. For passthru stuff, they might be able to tweak firmware, but the chipset really is needed for capabilities. HDMI over Ethernet is a non-starter since adding the bi-directional Ethernet packets to the HDMI stream seems to be a very complex operation from what I've heard.
So, the 4520CI has the following 1.4a-related capabilities over the 5308ACI w/3D: ARC and 4K. Not much unless you really want ARC or 4K. BTW, the 4520 also has the newest DenonLink (DL Lite), which I believe is a neutered step backwards from the older DenonLink in the 5308ACI, which has full DenonLink capabilities.
The use of optional capabilities is also a reason why the HDMI Org is forcing manufacturers to list capabilities and not revision numbers for HDMI anymore.