Onkyo renews its TX-NR646 and TX-NR747 AV receivers compatible with the new DTS:X format. Over the next few months, a free firmware update will be available that will allow you to use this new format.
They have 7 amplification channels that allow 5.1.2 configurations, the video circuitry is compatible with HDMI 2.0a and HDCO 2.2 with the required bandwidth of 18Gbps.
Without a doubt, they will be the most complete and competitive models for 2015.
http://www.supersonido.es/p/onkyo-txnr646-b
http://www.supersonido.es/p/onkyo-txnr747-b