I'm running that receiver in in my record room for my stereo (obviously) set up. I love this damn thing. Hooked up to my PS4, Nintendo switch, Samsung 4K tv, I have a desktop computer running to it, it has WiFi/Bluetooth and my turntable is hooked up to it as well. Sometimes I'll hook up a flash drive to it with flac files. The phono amplifier built into it sounds great. I have zero complaints.
OH WAIT, one complaint. It randomly shut off a few times. I started a help desk ticket with marantz and we troubleshooted. He basically held my hand throughout the entire email chain. In the end it wasn't an issue with the receiver. So I guess... No complaints. Haha.
It's also capable of bi-wiring so that's how I hooked up my R300s. I don't think you'll have any power issues with this receiver and those speakers
I included a picture. It's messy. My bad