Fredgrower - I will write an information about Tabriz rugs, how to identify and the pricerages in a few days, will not be able to do so right now, we have a lot of work - very unusual for summertime. About your question which other cities make fine rugs:
Top class is Qum (silk), Tabriz (makes up to 100 raj), Isfahan (we had one 1674 kpsi - I counted!) Nain in 6 la, 4 la or rare silkbase rugs, Ilam (Sherkat production), Keshan (some silk rugs at 645 kpsi), and my favorite: Meshed (Saber and Amogli workshop).
trg5 - I do have a lot of friends and customers all over the US, and of corse NY and LA are centers of rug business. But I didn`t knnow the rug you posted and whom it is from. But seriously - real nice rug. I really love it. Outstanding design and great colors. Not typical for US Market, but this is the real fine persian rug. It was not made to fit US or European taste, it is Persia pure.