Since I think you would be better off saving your money for sheng, I have a self imposed $20 maximum for shu. The best bet on the PS site would be
Why mess around with unknown factories (especially when dealing with a process as nasty as making shu) when you can buy from the guys who perfected, if not invented, the process?
By the way- shogun's 2nd choice is not
from the Menghai Tea Factory.