> Doesn't Asus have a function on its boards called Crashfree BIOS?
Yes, and it has worked as advertised for us, but we generally stay with stock settings and avoid overclocks for the sake of the highest possible stability.
Also RTFM: The manual for the P5Q Premium says ExpressGate does not work if you enable RAID on the main SATA connectors.
The ASUS P45 chipsets support 16GB of DDR2. G.Skill have a 16GB "kit" (4 DIMMs @ 4GB).
A good stock "sweet spot" is DDR2-800 (400 MHz "DRAM Frequency" per CPU-Z) and 1600 MHz FSB (400 MHz "Bus Speed" per CPU-Z) for a 1 : 1 FSB : DRAM ratio.