@maganga The Willsenton R8 is poorly constructed? What a blantant and biased lie. You’ve obviously never seen one in person so don’t comment on gear you’ve never experienced. The Muzishare you seemed to enjoy comes from the same factory btw, along with Line Magnetic, are they also poorly constructed?
@laecp for the most part your choices come down to China vs USA, big differences in price, but in terms of sound quality I have no idea. My search ended with the R8, my first tube amp and I don’t see myself upgrading to another tube integrated. Your best bet is to see what you can source locally and then compare them. I can comment on the Muzishare x7 and Willsenton R8 in terms of features, it was between those two when I was shopping. They are both available on Amazon with free shipping and a 30 day return policy, so not much risk there.
I won’t comment on sound quality, that is very subjective, and there are plenty of videos on Youtube with commentary. There are some key differences however that may sway you in one direction or the other. The Muzi has VU meters (very cool) a balanced input if you need one, and a MM phono input. The Willsenton comes in two different finishes (black or silver), is easier to change between KT88 and el34 tubes (has a bias switch) and a remote with more functions (can swap between triode/UL, & source) The R8 is also a little less money. I didn’t need the MM phono, prefer the black finish, and the bias switch was also a big factor. Oh and I love being able to change UL/Triode on the fly, it makes a huge difference in sound. And finally the R8 is much heavier, by around 15lbs. Due what you want with those details.