Denon's DBP-2010CI and DBP-1610CI Blu-ray players are made with high-end components, but at $US700 and $US500 respectively, they are missing perks found in much cheaper players.
They both have what pretty much every $US300 Blu-ray player from Samsung, LG, Sony or Panasonic has:
• An Ethernet port for BD-Live and firmware updates
• DivX and AVCHD playback
• Bitstream Dolby TrueHD and DTS HD Master Audio, requiring decoding in a separately sold receiver
They don't have Wi-Fi or any streaming video app, like Netflix or Amazon VOD. (You'd have to slum it with a cheaper LG or Sammy if you want those proletarian features.)
They both do have "superior" stereo analogue outputs and Burr-Brown digital-to-analogue converters for CD listening, if you're still into CDs and have really expensive speakers. Besides, the step-up DBP-2010CI also has 7.1 analogue audio outputs, though not sure if the 1610 does (doubt it). That's really only necessary if you have a nice surround-sound system, but don't have the cash to upgrade your receiver when you go Blu-ray.
The 2010 also has an Anchor Bay upscaler for admittedly badass playback of DVDs, and an RS232C so that custom installers can set up remote controls for it. That's really who it's for: Custom installers who go the extra mile—and then bill you for it. Go get 'em, Denon. I'll be here content with my LGs and Samsungs. [Denon]