asterisk users - Jul 2006 - Hardware/Software suggestions, Supermicro 6024H-TR?

Hi there,

I am planning on using the following setup for a production Asterisk Server
in a standard small office setup with fairly generic phone system
requirments.  Anyone with a similar setup, experiences, recommendations.
Any helpful info would be greatly appreciated.

HARDWARE
*Supermicro 6024H-TR 2U Server with Intel E7520 chipset motherboard
http://www.supermicro.com/products/system/2U/6024/SYS-6024H-TR.cfm
*Intel Xeon EM64T 2.8 Irwindale 800MHz FSB Socket 604 Processor Model
BX80546KG2800FA - Retail 
*1 GB RAM (2 x 512MB ECC DDR-400) Kingston.
*2x ST3808110AS (Seagate), RAID 1 using onboard hardware
*Sangoma Remora A20003D PCI Card 0 FXS / 6 FXO Ports + Echo Cancellation
*10 x Aastra 9133i SIP Phones

SOFTWARE
*Debian Sarge (Linux 2.6 kernel)
*Zaptel v1.2.7
*Asterisk v1.2.10
*FreePBX v2.11