I assume the pagefile is refering to memory hits that have to be written to disk (12GB for me... not a problem).
So, with larger arrays it is not necessary to separate scratch and project files, but just have it all in one big place? I also assume that this doesn't really apply to fakeraid (BIOS RAID solutions). I don't have a RAID Controller card yet, but was thinking of the ARC-1210 or ARC-1220.
Page file is the Windows page file, that is created by Windows as virtual memory.
Care to enlighten me what a fakeraid is? Better look at the ARC 1680 series.
A fakeraid is usually a BIOS based raid that is typically managed through BIOS, but actually uses drivers that work the CPU (so it is similar to a software RAID). So its not a true Hardware RAID controller. Many southbridge based RAIDs (like my own) are like this. I have the ICH10R on my x58 motherboard which handles Intel Matrex Storage to do RAID.
My current setup is all SATA II, I don't think I have a real need for the 1680 (though it does look nice and fast).
EDIT: Ah, didn't notice until now that SAS is SATA compliant along with SCSI. Still though, I think its out of my price range.