I know that you will probably shake your head in disgust, but I like the kimchi that Costco makes. It’s wonderfully fresh and flavorful, nothing like the packaged brands. Anyway, that’s my take; I’m sure there are much better finds in town.
Any wet market usually has loads of different kinds of paotsai. Yesterday at Carrefour in Hsintien I saw several different kinds, being served loose from big urns. Cabbage, white radish, other stuff.