Does anyone know what makes this unit unique to the 975? I would love to have one of these to stick between my Marantz 7701 and Sony 4ktv but spending another 270 bucks because I've only got an Outlaw 5000 in my system right now (long history of other Outlaw gear - 950, 1050, 990, 755, ICBM etc. - if I'm remembering my model numbers correctly) would make me feel like a bit of a sucker. No dig at Outlaw, of course, it's a great deal for their 975 owners, but at the unit's bust-out retail price I could theoretically purchase a lower-end 4k-capable receiver, heaven forbid ;-). Hoping this doesn't sound like a complaint, just wondering what makes this unit exclusive to the 975.