Can't say I 'know' tea, but I really enjoy it; just finished a pot of Gunpowder. As has been mentioned, it's a bit rougher (more tannic) but I like that. Favorites are: Dao Ren, Dragonwell, Gunpowder, Gyokuro Imperial, and Sencha (but that's Japanese, I think). I have a fairly strong dislike for flavored teas and coffees, so these are real 'Joe Friday' teas.
Peet's is a decent source at a reasonable price. Have also bought from
Buy Tea Online: Green tea, Oolong tea, Black tea, White tea, Herbal tea and more! | Teavana and gotten very good teas.