Actualy, you don't necessarily have to stick just one rep range, you can work for a wide range of reps.
Example #1
Upper A - Heavy push/Light pull
Bench press 5x5
Incline/Military press 5x5
Row 2x10
Pullup/Pulldown 2x10
Arms 3x8-12
Lower A - Squat emphasis/Hamstring assistance
Squat 5x5
Leg extension 3x8
Leg curl 3x10
Back extension 3x8-12
ABS 3x8-12
Upper B - Heavy pull/Light Push
Row 5x5
Pullup/Pulldown 5x5
Bench press 2x10
Incline/Military press 2x10
Arms 3x8-12
Lower B - Deadlift emphasis/Quads assistance
Romanian deadlift 5x5
Leg curl 3x8
Leg extension 3x10
Back extension 3x8-12
ABS 3x8-12
Example #2
Upper A - Heavy horizontal/Light vertical
Bench press 5x5
Row 5x5
Incline/Military press 2x10
Pullup/Pulldown 2x10
Arms 3x8-12
Lower A - Squat emphasis/Hamstring assistance
Squat 5x5
Leg extension 3x8
Leg curl 3x10
Back extension 3x8-12
ABS 3x8-12
Upper B - Heavy vertical/Light horizontal
Incline/Military press 5x5
Pullup/Pulldown 5x5
Bench press 2x10
Row 2x10
Arms 3x8-12
Lower B - Deadlift emphasis/Quads assistance
Romanian deadlift 5x5
Leg curl 3x8
Leg extension 3x10
Back extension 3x8-12
ABS 3x8-12
That way you never neglect specific rep range. different rep ranges have different influence on hypertrophy. high rep range has more focus on sarcoplasmic hypertrophy (sarcoplasma of the muscle fibers, as well as Cp and ATP storage), while low rep range has more focus on myofibril hypertophy, which is the actual Actin and Myosin constraction proteins.
Beside that, you don't have to overthink about the range that is most beneficial for you. unless you know what is the most beneficial for you (which is not the case) or you have preference for any rep range (like me, i realy hate working with high reps), in this case i think you will find programs like the two examples above appropriate for you.