I believe their titles are good enough.

You have 4 independent reviewers with no bias on your research and another 3-4 letters from referers that work closely with you. This is certainly adequate. As what I mentioned above, try to get all of their CVs and attach to all the letters.
However, what's more crucial is how you address the NIW three criteria in your petition letter and the recommendation letters, particularly the third criterion. If your lawyer is good, he should know how to help you answer all of them.

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• pharmacyelite: many thanks for your sincere advices, -jnjose- ♀ (13 bytes) () 12/21/2007 postreply 09:36:13