I suggest you to practice as many tests as possible. Overall, tests are becoming more difficult these years. You've done a good job already, and Princeton, Kaplan, Nova, etc. etc. are just for green hands, not for you. LRB and LGB, however, are good for you to clarify some thoughts. I skip the recent real questions used in LRB. After I finished all the tests, I will look through LRB again. I love this book.
I heard Kaplan 180 is good for people who want get 170+. You might look at that one, if you have time. The questions in 180 are fake, but they just mimic some challenging real questions.
Anyhow, your practice scores are very good! You will have a good job on real test. Good luck! For me, I still have a long way to go to get 170+.