TLK's suggestion seems to be a sound one.
And I think that a desi therapist sounds like a great idea because it's like you said...he/she would have a better idea of some of the cultural issues. Western therapists are more apt to say, for example, "you have to live your life about you and the heck with what everybody else thinks." Which is actually good advice. But it's not completely feasible in a desi society...a desi therapist may be able to suggest a happy compromise.
As for an imam - while I'm sure there are some really fair minded ones out there, I am afraid that most of the stories I've heard aren't too positive. Women that I know who've been counseled by imams for marital issues tend to come away with the feeling that the imam comes down harder upon them and makes them feel as if everything is pretty much their fault. But that's just what I've heard - I have no personal experience and I'm not trying to turn this into a male-bashing thread.