I agree the Raidho's through the D series had a very high MSRP. They had high dealer margins and were liberally discounted by many. I don't know if that's true anymore since Lars Kristensen and Michael Borresen left to start Ansuz, Aavik, and Borresen Audio. The new Raidho's have undergone considerable changes that I haven't heard.IMO they will stay but prices are going to drop fast like Raidhos on the used market.
MSRP is way to high therefore better to wait for used pairs.
Build quality is awesome though.
I still own Raidho D3s that have had very holographic midrange and highs even when they were housed in my open plan FR. But the low end is its weak point - as with most single box speakers. In 2019 I added a JL Audio F212 sub and CR-1 crossover. JL Audio helped me seamlessly integrate them with the D3s - now my system has a palpable low end as well.
I haven't heard the Borresen 03s, but considering the brilliant design engineer (Borresen) I don't doubt they sound really great, especially in the right room. I'm more skeptical they have the kind of low end my system has presently.
IMO it's really difficult to audition audio equipment at audio shows, most dealer showrooms, or manufacturers facilities. I visited YG several years ago and was disappointed with the Hailey's. But the listening room they had at the time was more of a cordoned off warehouse space.
The listening room I built in 2019 was acoustically designed and built. It's not perfect, but significantly better than any place I've been able to visit so far. From my experience the room acoustics and power supply are the two factors that most affect how well we hear the sound produced from our speakers.