There's apparently a relatively new tea from Taiwan called Ruby 18. It's available by mail order, but has anyone seen it locally? Heard about this on Splendid Table Jan 2011 (just listening to some old podcasts now).
Upton is mail order, but they're local, and their selection and quality are outstanding. I prefer MEM's chai blend to anything that Upton offers, but other than that I buy almost all of my tea from Upton.