The X4100W is Denon's most affordable AVR designed for Dolby Atmos immersive sound. In addition to Atmos, the X4100W's enhancements over the X2100W include more powerful amplifiers and better Audyssey room correction.
Today, there are more SSP options on the market, but few of them are as up-to-date as the AV7702. Considering the AV7702's hardware and feature upgrades from the AV7701, I am impressed Marantz managed to keep the price so close to the old AV7701's.