Well, I don't own the X1000, but I have owned plenty of Denon, including ones in the $300-$500 range.
The X1000 has Audyssey XT + single Sub EQ + Dynamic EQ (DEQ), which I think is very good. I highly recommend DEQ.
In terms of power output, the X1000 should be similar to the Denon 1913: 118WPC x 2CH 8 ohm/ 151WPC x 2CH 4 ohm/ 82WPC x 5CH 8 ohm @ 1% THD (measured by HTM).
So it should a very good AVR and should be able to power most speakers in most rooms at sensible smart volume.