Just an FYI--according to the AVS website, the Denon 890 is the same as the 2310 in all respects except the following: "1. the 2310CI has a second, Zone 2 remote in addition to the two-sided regular remote 2. the 2310CI adds 'CI' features for integration into automated, custom integrated home systems: an RS-232 port (e.g. for Crestron/AMX 3rd-party control, as well as for loading firmware updates), assignable 12V trigger" Typically the 890 is about US$50 cheaper than the 2310. I ended up with the 2310 only because I found a good sale on it that actually made it a few bucks cheaper than the 890 (which I had purchased but then returned).
