High, Noble, Refined
noun, な adjective
You only hold someone in high esteem if they are really high, noble people. They have to be refined to be held so highly by you.
こうしょう
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
高尚な趣味をお持ちなんですね。
You have such refined tastes.