Hello,
you are right, EAL3 is a high level security certification; e.g. the MDS9000 is EAL3 is certified. For a current listing of (Cisco) products that are EAL3 certified, you can visit the Common Criteria Portal:
http://www.commoncriteriaportal.org/products/
As for SCP-2 and SFTP support, use the Feature Navigator, as this also depends on the software version in use:
http://cfn.cloudapps.cisco.com/ITDIT/CFN/jsp/by-feature-technology.jsp
RS-232 and out of band management ports also depend on the model, a lot of the newer models (such as the 3750X or the 4500X) do have OOB management ports.
HTH