Best tool for vendor invoice management in SAP

[soerenh]

Hi all.

I am looking for the best tool for vendor invoice management in SAP.
By that I mean:
- scanning of paper invoices and recognition of data
- receipt of digital invoices
- workflow for approval
- automated posting processes.

I know of Basware and OpenText solutions.
but can anyone recommend other solutions? ..and why?

Regards,
Soeren