Compare and Contrast with other tools? ISP Market?

Hi,

I am scouting for Netflow based tools for use in an ISP environment with about 20+ geographically distributed routers. We would like to do basic network intelligence gathering (top customers, top applications, etc) as well as detect for anomalies (mainly DoS, route misconfigurations, etc). The NetflowAnalyzer online demo looked quite impressive! Do you have any white paper that compares and contrasts NetflowAnalyzer with other Netflow tools, open source and commercial (nfsen, flowtools, Caligare, Arbor Networks, Packet Design, etc)? Is NetflowAnalyzer mainly meant for enterprise networks or can it be used in ISP environment as well?

Thanks,
KK