Regarding darjeeling tea i would say best ever tea i have taken in my life some 10 years ago. I doubt its originality on amazom otherwise i would have orderd it right before commemting on this post.
Regarding kashmiri kehwa- nice to know that u liked it as i am from KASHMIR and i know how awesome it tastes because we take it quite often.
i would suggest you to take kashmiri saffron kehwa which gives a feeling of heavenly drink.