[BBLISA] Mobo recommendation - PCI-X slots?

[Scott Ehrlich]

I'm looking for a recommended tower PC (case + mobo) that has room for three 
spacious PCI-X cards, 2 Gig RAM, and possibly SATA/SAS drive connections. High 
quality and high reliability are of utmost importance.   Price is NOT an issue. 
Ample power for the PCI-X cards (voltage and current) is also vitally 
important.   The order of the 3 cards is critical, so there must be space 
length and width-wise for the slots.

It must also fully support Windows XP.

Thanks.

Scott