Hello Erik,
Scrutinizer from http://www.plixer.com/ supports all of those features you listed and scales to over 100K flows/second.
http://www.plixer.com/Scrutinizer-Netflow-Sflow/scrutinizer.html
Good luck with your search.
Laura,
Do not appreciate the cold call from Plixer. Please do not use the NANOG mailing list as your personal directory for sales leads. It's a sure fire way to get your company blacklisted among IT professionals.
--Brent
That wasn't in your signature's disclaimer. Perhaps now would be a good time to add it?
Geez.
--tc