I'm looking at potentially purchasing a new to me second hand AVR for my system. I want to get something that is Dolby Atmos and THX-X capable so I can take advantage of those technologies in the future but probably won't use them right now. For now, I'll just be using a standard 5.1 setup. I've been using an Onkyo TX-NR809. I can get either a second hand Denon AVR X1400H or an Onkyo TX-NR747 for about the same price I haven't been able to find any reviews that directly compares the two. Both sound like pretty good units. Which one would you recommend and why?