Choise of Symantec product for business security - what programs?

I'm at the stage of purchase Symantec backup solutions (Backup Exec) but I want also find security solution most similar to "twain" ESET Gateway and ESET Endpoint Antivirus NOD32 Enterprise Edition. I guess that ESET Endpoint AV (EE) can be replaced by Symantec Endpoint Protection (am I wrong?), but what about ESET Gateway?

Greetings!