I'd advise looking carefully at all of your alternatives, especially PAR56, PAR46, and the new PAR20 bulbs. Here is a comparison of some of the various PAR bulb sizes. PAR lamps contain an integral lens and reflector. The dispersion pattern is built into the bulb. Different patterns look better in different applications and you buy the pattern with the bulb, so be aware of what you are buying.
Narrow spots are excellent as spot lighting where better lights are too expensive or impractical.
They also can be backed further from the stage without spilling light off of it, if placement is an issue. But be careful, if hung too close to the stage, their tiny angle of coverage can make them almost useless. Wide Flood Bulbs are very splashy and put out less lumens per square foot due to their wide dispersion. They are most useful in very closeup situations or where you'll be using just a few fixtures to cover a stage with light. Lighter gels can help the wide flood bulbs cover more stage area effectively.