In chronological order:
PowerPrep 1: 164 (V), 162 (Q) = 326
Manhattan Online Test (Free): 162 (V), 158 (Q) = 320
ETS Book, Practice Test 2: 165 (V), 159 (Q) = 324
ETS Book, Practice Test 1 (Verbal only): 169 (V)
PowerPrep 2: 166 (V), 160 (Q) = 326
Actual Exam: 166 (V), 160 (Q) = 326
As you can see, PowerPrep predicted my scores exactly. I got the same total as Test 1, and the exact scores of Test 2.
All the best for your exam!