In all honesty, I didn't think that the U.S.A. had very good tea whilst I was there. However, I notice that Madura tea is exported to the States now, so it should be improving. I really like lapsang souchong tea but it is not to everyone's taste. There are many nice tea brands and my personal preference is for Twinings and Madura. You can have a look at the Madura brand at the address below:
http://www.maduratea.com.au/shopping.html