Great price on this 'mid range' Receiver, With my impending 4K TV purchase, sound will be the next frontier for me. My trusty Onkyo TXSR701E will move to a dedicated projector room, so this is looking like a good proposition.
Attached a couple of quotes and a review for your reference;
From audioholics.com - "105W per channel, but more importantly the AVR-X3100W offers a full complement of preamplifier outputs for attaching an outboard amplifier. $999(US Price) also buys you improved multi-zone capability, with Zone 2 HDMI, Toslink, and digital coaxial outputs that can deliver content independent of the main zone.
The next important bump is to Audyssey’s Gold suite of DSP technologies, as well as the option for Audyssey Pro, which allows installers to finely tune the performance of your system.
Last but not least, the AVR-X3100W supports video upscaling to 4K/60Hz resolution, taking full benefit of the HDMI 2.0 specification."
"The AVR-X3100W really catches our eye thanks to the inclusion of 7.2 channel preamplifier outputs, Audyssey Pro, and an independent zone 2. These options really set the 3100 model apart, allowing it to function as the command & control center for all but the most complex of A/V systems.
Review: http://www.trustedreviews.com/denon-avr-x3100w-review
Digital cinema $1799.00 (http://www.digitalcinema.com.au/denon-avr-x3100w-7-2-channel…)
I have the AVR-X2000. Great unit. Can only imagine the 3100 being even better making this a great buy!