Excel Charts vs Delphi Charts

Hi-
I'm new to using Delphi and so far am loving it!  

I'd like to know what the opinion is as far as developing charts &
graphs in Delphi versus using Excel to develop charts and graphs?

These charts/graphs that I will need to develop are a monthly event,
so I can see where it would benefit using Delphi in setting up some
kind of menu-driven, query-based application to set up the
graphs/charts.  Excel seems cumbersome?

Any input is appreciated.

Thanks!
Donna