Having read through this thread and found it extremely helpful, I thought I would share my problems, and their solutions in the hope it will help someone else.
Firstly, apologies, its the Deluxe version, not the Premium, but as they are nearly identicle the same solutions might apply. I did originally have the Premium, but as the case is the Lian Li, the infamous heatpipe problems resulted in a swap to the deluxe.
Started off having terrible problems with the board recognising a Maxtor SATAII drive. I could not get it to recognise it for love nor money. Eventually fixed by moving the drive to the red SIL ports and setting up a JBOD RAID config on the disk and installing the SIL 3rd party driver. Windows then worked fine.
The next problem was the PC would not restart, only shutdown and start. It hung on the windows screen, or a black screen when the mouse first appears.
Fixed this by flashing the BIOS to the lastest (1016 iirc).
Board now works a treat. After an incredibly stressful build, it's now working fine.
final specs:
Asus A8N SLi Deluxe
AMD FX-57
CorsairXMS TwinX Pro 2GB
2x XFX 7800GTX Extreme
Maxtor 250GB SATAII
WD 160GB SATA
Creative X-Fi Fatal1ty
Enermax Noisetaker 600W
Lian Li V1000 Case
initial 3D Mark 05 score was 12,646. Hoping to push it up into 13K when its properly configured.