I love Ito En, super fresh, super quality... http://www.itoen.com/estore/index.cfm
Try the Chiran Kamiyamidori Sencha, it will blow your mind-
Wasn't too impressed with Stash but maybe I just ordered the wrong tea, as it was early in my tea career...
Rishi seems adequate, but haven't had any truly exquisite tea's from them, aside from their Silver Needles- But I have not sampled everything, so I couldn't say for sure.
Adagio looks good but I have ordered only the utilitea kettle so far, haven't tried the leaf-
Good luck!
-Joel