Best GMAT study guide?
Any recommendations? I went to Barnes and Noble earlier today and was overwhelmed by the number and variety of GMAT study guides that are available these days.
I'm looking for a guide that has access to a good number of practice tests (either in the book itself or online), has organized, easy-to-follow lessons for all of the concepts that are covered on the test, and plenty of vocabulary words to study. More than anything, the book should be thorough without being too dry.
Some of the GMAT prep guides I saw at the bookstore included:
REA (Research & Education Association)
Official Graduate Management Admission Council GMAT Review book
And others I can't remember right now.
I'd appreciate any recommendations along with a reason for your choice.