[CentOS] ISCSI SAN suggestion

Sorry for the off-topic question but I need advice on a buying a ISCSI
SAN for 4-6 servers running CentOS 4.4 .The main  purpose for the SAN
is to store email accounts (that will be accessed by imap - dovecot)
and other documents. Minimal redundancy is required (e.g. dual power
supplies, battery backed write cache or mirrored controllers) and
price for a 2 TB configuration should be under $ 10000.
Right now the short list includes Promise VTrack M300i and Dell/EMC  AX150i.
Do you have any experience with any of these models or can recommend a
similar SAN that will meet the above requirements?

Regards,

Radu