I loved my pair of Onkyo TX-SR705 – replaced it with Onkyo TX-NR609 (1080p driven buy) and again sold it to buy Onkyo TX-NR636 (Atmos driven buy). I also have Pioneer SC-1522K in the basement (9.2 channel Neo:X) – all producing anemic, high treble sound at best.
I loved the power and soundstage of TX-SR705, and my one of my biggest regret till date is not buying TX-SR805 in 2007 (1080p, 60 lb. beast).
Kept searching for the soundstage and sheer enjoyment a great receiver could bring. Onkyo added Bluetooth, USB, and bunch of goodies but took away the joy of listening. Class D amplifiers of Pioneer - to me sounded great for movies, unbearable for music.
With TX-RZ900 Onkyo has created great sound machine - movie, music, and soundstage - awesome amplifier that I plan to enjoy for next 5 to 7 years.