Re. FUTURE PROOFING:
HDMI I/F Spec has been changing about every other year, with minor tweaks in-between....which makes it VERY EXPENSIVE to keep buying new DTV's and AVR's year after year after year:
Many HDTV's and AVR's currently in stores don't even implement HDMI v.2.0b
, released Mar 2016....and the mfr's are making it much more difficult to determine WHICH version is in which equipment. FYI: Manuals for both of your AVR's did NOT say, nor was I able to deduce HDMI version from list of features...esp, whether 4K was 30 fps Max.....or 60 fps Max:
And although HDMI v.2.1
came out this January, I don't think we will see any UDTV's and AVR's until at least XMAS....and maybe later. This is an IMPORTANT upgrade: 4K/8K/10K at up to 120 fps Refresh.....which is what Sports Networks have been looking for before they change away from current 720p at 60 fps. It also introduces DYNAMIC HDR (High Dynamic Range) Video, which re-normalizes throughout the program, rather than the one STATIC normalization for the Entire Program in the current HDR implementations. However, since Dynamic HDR has yet to hit the streets, there are NO REVIEWS to KNOW how big a deal it really is. Also adds Enhanced Audio Return Channel (eARC) with additional [missing] Hi-Rez Audio Formats that were already on HDMI I/F....and some Virtual Reality (VR) Enhancements for Gamers:
So.....you might want to wait until XMAS....or next year....when the latest HDMI v.2.1 Equipments should hit the stores.....
Since you already own an OPPO BD-Player, you may find my fol. post of interest. For AUDIO, I have thus far AVOIDED the HDMI built-in Obsolescence problem....indeed my high-end Pioneer AVR (with low Transient Intermod Distortion Power MOSFETS) is so old it doesn't even HAVE HDMI interfaces....yet I can play ANY and ALL of the Hi-Rez Audio Formats supported by my Oppo BDP-93 Player....without any DownRezzing. And ALL Video goes directly to UDTV which has 4 HDMI, 1 C-V [plus 2:1 Switch] and 1 Video INPUT. This also makes it EASY for my wife to use JUST the Cable System R/C [VIDEO button Selects UDTV Input]...she doesn't even have to KNOW how to operate the AVR:
Oppo vs Sony for SACD, DVD-Audio, etc.?
Neither of your current AVR's has the DD5.1/7.1 Analog Audio Inputs [six or eight RCA Input Jacks for LF/RF/C/LS/RS/SW+LB/RB]...a trend that prevents using this trick. If interested look for DD5.1/7.1 Analog Audio Inputs on candidate AVR's....or investigate using an AVR that has PRE-IN/PRE-OUT Jumpers on the Rear....or a separate Preamp.