I feel the same. This little amp certainly punches above its price point. With a 1940's 6C8G Sylvania (green leaf logo), it sounds absolutely wonderful with my HE500 and Utopia (whenever I bring these two to work). Yeah, it is a few notches below my home setup, but sometimes this little guy surprises me. For example, I brought my HE500 to work last week and listened to it on my CTH for the first time in probably two years, and I forgot how well my humble work CTH+Modi 3 setup synergized with my HE500.
Not my exact work setup below, but you get the idea. For the CTH to use a 6C8G tube, one needs a 6922/6DJ8 socket saver and a 6F8G/6C8G to 6922/6DJ8 adapter:
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