Keven Deal hosted a Tube Q & A today at THE Show. I asked his opinion on Chinese tube amps. Keven thought, in general, they can be an excellent deal. He's seen an heard some that were manufactured very well and sounded nice. His concerns are with quality control and manufacturing consistent quality products. He alluded to the fact that it's a gamble, but if you find a good manufacturer and company to work with, Chinese-made tube amps are worth trying out.
It was an encouraging and informative talk, especially considering I just bought my first Chinese-made tube amp.