Our non-enamel stuff is Lodge and it's been terrific. Our enameled stuff is Le Creuset and they have likewise been terrific. We have dutch ovens for both.

I try to avoid stuff made in China out of principal, but it doesn't always work out. The Le Creuset dutch ovens we have (two of them) are used at least a couple of times a week and have been flawless for over a decade now. My daughter even scrubbed one with a metal blade to clean it (!) and it didn't hurt the finish.