Building a Enterprise Level NAS system.

We are looking for someone who is able to build a NAS system for Enterprise Solutions for generic purposes. Basic Hardware Specifications are as follows :- Duo Intel XEON Processor 4GB Ram and higher 1GB / 10GB Ethernet Network Interface Hardware RAID controller upto 16 ports OpenFiler OS Installation We need someone who has experience with Enterprise Solutions and to use off the shelve products. Please email me if you have any specific enquiries and for more information. Thank you and Regards Jay