Looking for Motherboard suggestions....

I have several dual-CPU machines. Yes....these are true multiple-CPU machines, not multi-core machines. With one exception, I have been very happy with these machines over the years. I would like to build a super server based on a dual-CPU config with quad cores on each physical CPU. I haven't paid much attention to the hardware on the high end recently so I am looking for some suggestions on what to investigate. I will say that I am partial to ASUS and GIGABYTE mobo's and I like Intel but will certainly consider AMD as well. I would also like a mobo that supports 16gigs of RAM or more.

So...in summary, this is what I am looking for...

MoBo that support dual CPU's @ quad core each CPU

Supports 16 gigs or more of RAM

on board SATA RAID

eSATA support (optional)

 

Anyone have any suggestions?

 

Cheers!