Check out a fascinating piece by Rabbi Yitzchak Brand, debating Rabbi Moshe Tzuriel (Hebrew) here. The article concerns the permissibility of praying at the graves of the righteous and asking for their blessing while they are alive.
Rabbi Brand also discusses whether it is proper to go to Uman for Rosh Hashana when this means leaving the land of Israel, and other concerns. (And there is an interesting rebuttal in the site comments.)