5X5's have probably been responable for adding more muscle mass & power to thousands of men over the years. The original concept was for a whole body workout, with 5 total execises preformed in the workouts (some call the program 5X5X5's or triple 5's) . That's 25 reps per body part. Quite a few BB'ers who haven't been making progress (slow or nil) in their regular training can take a week off and than go back to the basic's of 5X5's. This does not mean that anyone can't split the 5's during a training week, like lower body one day, upper next, etc. Some experienced lifters will do 7X7's per body part for recharging training gains.
Military presses are a great muscle builder for the whole shoulder girdle. Even the trap's and upper pec's are involved to a certain extent. The push or jerk presses are also prime mass developer's. Any of these above exercises build the joint complex even stronger when preformed in correct style. Joint stress and potentional damage can appear when the bar is pressed too far forward overhead and not directly inline with the body. Also when the elbows are held too wide, rather then closer to the body. Of course flexability and a good warm-up before training is always good insurance. My personal view (for what it's worth) is the the BP gives more potentional for shouder injury than military presses.
Presses can be approached as a powerlifting and mass builder at the same time. They go hand in hand. Might even try the 5X5's on a pressing program. The Bradfors press, though not for everyone, hits the delt structure very well as does the PBN. Half to 3/4 reps are what most all the Pro's (Ive seen live and in living color) and some very strong men, do mostly in their workouts. I have never seen a truly big man complete full ROM's in any overhead pressing, including total lockouts.. Though the Smith machine is usefull in any kind of pressing (ovehead, bench, incline, etc) motion, it does not allow following the individual strength curve, the pattern to too ridget. Might be OK for lighter weight loads (like conventional, moderate weight BB'ing) but the odd's for serious injury will always be present when heavier weight's are used.
Might also want to incluse a DB exercise to go along with a pressing program. The one are side press comes to mind as an excellent power & muscle builder. Good Luck.