Overall, Kangke ARFs have a very good reputation for quality. They're not the cheapest ARFs around, but they seem to offer good value and they're certainly not overpriced for the most part.

If Kangke makes an ARF that you like, don't worry about the quality. By all accounts, you will get your money's worth. They also offer some of their ARFs bundled with SK 2-stroke engines for a pretty attractive price:

http://www.kangkeusa.com/specialbuy.htm

You should post about your experiences here in the ARF forums. Given their reputation for quality and value, it's too bad Kangke ARFs aren't discussed more often. Good luck and good shopping!