Current, Amperage

I’m trying to make sense of the argument about various types of speakers [ sensitivity, brand, etc ] and their relationship with power/ current/ amperage.

Can someone please provide some basic perspective.

I have a 91.5db tall floor speaker [ Focal Chorus 826V ] and what should I look for in an amp to drive these? How much power do I really need with all things being equal? I use a VTL tube 2.5 amp if that matters to the discussion.

Thank you.