I am not an audiophile by any stretch, but I do love my 3900 and I just can't foresee getting rid of it anytime in the near future for anything. Plenty of power, great features and the SQ is superb, especially with music. As far as my Aperions go, I wasn't aware they were made in China, but even if they were, I liked the sound at least as much as the Paradigms, and I got a great deal on them. I was able to sell the Studio 40s at a large profit, so there they went. Do I regret it---sometimes, but overall I am very pleased with my Aperions. That's not to say if a great deal came along on something else, I wouldn't switch again.
After all, that's kind of the nature of this hobby/obsession, huh?