Hi, Dominic--

Of the vendors you list, Ippodo is my favorite for Japanese tea. When
friends travel in Japan, they send me Ippodo tea. I often purchase
from the Ippodo website, and I have never been disappointed. Each
spring, I make it a point to purchase the shincha. I am a devotee
of Ippodo's matcha, particularly of the Seiun. My first Ippodo order
was in February of '06. Ippodo's prices seem to be in line with the
competition's, and Ippodo's quality is--overall--better, IMHO, than
most others'.

Regards,
~grasshopper