I also think it depends on your strengths/weaknesses. Math is (and always has been) my weakness, and I've really gotten a lot out of the Princeton GMAT Math Review book. It gives much more in depth explanations of certain mathematical subjects than the OG. However, I would stay away from the Barron's Math Review all together!
I've used both the Kaplan GMAT review and the OG 11 also, and for verbal, I think they're both good. The benefit of the OG is that they use actual old GMAT test questions, so it may be more indicative of the actual test. I've also just recently gotten the Kaplan 800 book, and although I've only just briefly looked through it, it seems to be a good source of just hard questions and tips.
Good luck to you!