Flying on one of the Asian airlines will provide the best experience in any class. Singapore is probably the top, with any of the Japanese airlines. Cathay Pacific (Hong Kong) used to be on par with Singapore, but they've been on a downward spiral lately. EVA (Taiwanese) is the up and coming. Asiana (Korean) and Korean Air comes next. Skip China Airlines(Taiwanese) and any of the Chinese ones unless you're going to Shanghai or Beijing and the price is right.
YMMV.