Good thing is u have enough rooms in both Q and v to improve.
Ur practice test results,if u took them under real condition, are much higher, it is good indicator that u have potential to hit 7XX barrier.
I recommend u to read some success stories/tips in this forum and acquaint urself with some good strategies for preparation.
Also ur material is limited. OG 10/11/Quantitative/Verbal, Manhattan ( Maths and SC), Kaplan 800, Powerscore CR bible, Challenges (25 math tests), GmatPrep CATs , Old retired paper tests and Sets are highly recommended.
Plz keep in mind ( this quotes are not mine):
1) sometimes a success/luck is closer to u than u think: give one more shot.
2) Not Quantity but quality is important- u don't have to cover all the materials in order to success.
3) Know whether u r ready to take the test:(endurance, knowledge,and health).