My Yamaha DSP A-1000 was the TOTL A/V receiver in its day, and I thought I'd use it forever. It sounded ten times better once I started using my Carver M 1.5 as the amplifier, and sounded ten times better then that when I replaced it with a pre-amp.
After that, it sat in storage for fifteen years, and one of the many computer boards failed, so it faulted to shutdown every time i tried to turn it on. Straight to recycling.
Any of my preamps, from my cheapest adcom to my apt-holman to my best Bryston run rings around that receiver, and it cost near 2 grand in 1993.
It had direct ( bypassing all tone controls and DSP)
So, In my opinion, you'd be better buying the best 2 channel receiver you can afford, then wasting your time on an A/V receiver, or better yet, go seperates.
Hell, if you only need on input, the Lepai 7498 (100 wpc @ 4 ohms) beats the hell out of that TOTL Yamaha A/V receiver.