BSP Vs Webdynpro

We are using WAS 6.20,SAP 4.7 &EP 6.

We have already linked some of the BSP Applications in the Portal.

Our Client wants a similar thing for HR head count with charts.

In Bsp we r facing problem in Curve charts.I don't know whether web dynpro will help me in this regard.

My Q's, Which one is better ? BSP or Webdynpro.

Wht's the minimal configuration needed for

Webdynpro?

Rgds

J