Quick question, what FPS do you need(avg.)? Are you writing to any iSCSI storage? Is this mulit-site or one large facility, such as a prison? Are you archiving storage via the network to external storage? Is there any integrations for alarm links or SNMP traps? How many failures have you had on the Cisco? How many people within your company does it take to keep the Cisco, VMS and camera system functional? is this just a cost comparison or has a customer budget changed or are alternates being asked for? Do you need to multicast or is this centrally managed? Are you recording audio? Do you run any analytics processors on the same network or do you utilize a different lan?
Design is more than one component, I cannot teach you anything only inspire you to think.
I would consider Uptime, ease of replacement, switch firmware management and tftp backup process when I look for a competitor. Cisco is good, however there are a lot of alternatives.
I will be watching this thread, incoming SALES REPS!!