Accounts Payable Invoice Automation

We are looking for third party solutions that integrate well with Lawson to automate our AP invoice process. This would include OCR to capture invoice data directly into Lawson AP and an approval process.  We are also looking for a vendor (ideally the same one) that processes employee expenses through a portal also. We have a couple in mind Concur, Lexmark or Ascend. Does anybody have any experience with an intergation of this type that they are willing to share?