E-mail Archiving

We are looking at implimenting an e-mail archiving solution. We are and Exchange 2000 Outlook 2000 shop. We’ve got 3 in mind. The first is KVS (veritas) Enterprise Vault, the second it Zantaz’s EAS and the third is C2C’s Archive 1.

Has anyone ever dealt with this and do you have any input, anything at all would be great. Any recommendations, tips, hardware, anything. Thanks