My Willsenton R300 had a board fail on it just when I was demoing it to sell to a guy who drove quite a way to see it....not a fun experience for either of us. Completely stopped making sound. As it is a new model maybe give the designers some time to work out any weak points in the circuit before considering buying one. And while it is warm and organic sounding it is not anywhere close to resolving like higher cost amps.
Anyone with $5k to spend should move on from Chifi. I am a bit of an Icon Audio fan right now. I have the Stereo 300 mkII (300B) and also the Stereo 40 mkIV (KT88). The selling point of these amps are the transformers which are fantastic. Very resolving. But you need to do the Mudorf capacitor upgrade to go to the next level with them. I did it myself but the factory and some dealers also offer it. They also have a KT150 single ended but I have not heard that one....
https://iconaudio.com/stereo-30-se-single-ended-integrated-amplifier-stereo-30se
Anyway I have not heard anything sound better than these two amps with the Mundorf cap upgrade. And while the 300B is very natural, wide, and deep sounding the Stereo 40 has the punch and resolution to be the first choice if only owning one amp.