My apologies for the tardy response. You asked what speakers I was driving with my original R2000. Those were KEF Reference 3s. I now have Sonus Faber Serafinos. The KEFs are good speakers and benefited from a fair amount of power. My room is about the same size as yours and at my normal listening level- I never wanted for more. But every now and then - when my wife wasn’t home, I played symphonic music at scale. It was only then I experienced this limitation. But the R2500 has significantly more power than the R2000 so perhaps not an issue for you.
FWIW - the R2000 never struggled with the impedance or difficult loads from the KEFs. I had two previous separate power amps in system at some point - a Parasound Halo and NAD Masters series. Both had more significantly more watts than the R2000, but didn’t sound nearly as good but it’s also fair to note there were other preamps involved too. Regardless, I offer what I experienced and hope it helps.
I’m intrigued by the new unit. I’ve got another building project about to start and this might be a good choice as I really do like the brand and engineering behind it. I was thinking the DAC200 with accompanying multiplayer and class D monos or stereo amp, but the R2500 might be just the ticket. Also under consideration would be the new North line by Sim audio. My local dealer who carries that line raves about it - but I haven’t heard it yet. Not quite all encompassing as the T+A unit, but still looks interesting.
The Hegel mentioned above has a strong following and I understand it’s quite good. But, I’ve never heard or put my hands on a unit so I can’t be of any help to you there. And, because it isn’t carried by any of my locals shops, isn’t on my particular list.
I look forward to hearing what you decide and about your experiences.
Best,