[VoiceOps] NMS recommendations

Hey All, i'm looking for recommendations for new nms platforms. We currently use one open source platform for CPE and one platform for Core and Infrastructure. I'm looking for a commercial or open source that can handle all devices from Network, Security (Firewalls), Servers (Linux, Windows), ESX, and standard SNMP devices. I need it to be relatively easy to implement and geographically redundant. If i can collapse both CPE and Core into one platform, that would be a bonus. If there is something i should stay away from, please mention that as well. thanks! Shri