Convert to HCO or keep Orion modules?

OK, so I have a customer who currently has LA, NPM, SRM, VMAN, SAM and NCM. They also have DPA. My thought is that they could convert to HCO Advanced, but I cannot tell if they would still need to keep DPA, or whether DPA functionality is covered with HCO. Can anyone help me with this decision?

Thank you in advance.