Intrusion Detection Protection Systems for Small Businesses

I’m trying to evaluate IDS/IPS systems for a small business that has a DMZ and internal requirement. Our present Firewall works; but isn’t up the Payment Card Industry requirements. I’ve been reviewing the Symantec SGS 360R server and it seems to be a capable device; however, I can’t tell if it has DMZ capabiliities. Has anyone used it in that type of capacity?