Speedlite recommendations for indoor graduation

[Raho]

Hi everyone, I am looking for a speedlite for an indoor graduation that will work on a Canon E0S t5. What one seems to work best? 

Thanks a million! 

[kvbarkley]

The most expensive EX that you can afford. I would suggest a 580EX.

[deebatman316]

What is your budget for a speedlite. What lens are you using. Is low light a concern especially if the camera can’t lock focus.