Which of the following tests is more preferred??????

Hi guys,
Since you are more experienced than me and you know about different tests and their quality, would you please help me to choose one of these tests.
A)For verbal:
I`ve studied all Manhatan books 3 times as well as Bible CR and I did all 700-800 questions from a pdf file which I downloaded from this website. Now since there are a lot of questions from different sources, would you please rate these tests and recommend me which one is more preferred?
1-Official Guide 13th edition
2-Official Verbal guide 2nd edition
3- GMATPrep files which I`ve downloaded from this website

B)For Math
I`ve studied all Manhatan books 5 times and I also have just finished GMAT Math Bible book and did all of its practice tests. And now since every source has lots of practice questions, I`m not sure which one is really worth it to be studied.
1-Official Guide 13th edition
2-Official Math guide 2nd edition
3-GMATPrep math files which I`ve downloaded from this website

I appreciate your advice and you have no idea how confused I am.
Regards,