What is the existing processing? The dbx SC 32, like the Ashly ne24.24M, basically provide input blocks with some processing options, a matrix router and output blocks with some processing options. That can be quite different than the completely open processing, routing and mixing architecture some of the other options noted employ. These units may work fine for your application but you would probably want to be sure that whatever you select provides the internal routing, processing, mixing, control, monitoring, etc. that you potentially need or desire.
If you have anything other than analog mic or line level inputs and outputs that could also affect the potential options. For example, needing to support AES digital inputs and/or outputs could eliminate many products.