well I have a few choices as far as my recommendations would go
(btw not advertising for any sites but here are some web adresses to the mother boards)
http://www.newegg.com/Product/Produc...82E16813127150
if you want integrated video
and:
http://www.newegg.com/Product/Produc...82E16813127167
if you want more fancy connectors (optical PDIF connectors)
and if you don't want any of that
http://www.newegg.com/Product/Produc...82E16813127166
as far as the scsi controller I will have to look a bit more
and i think the fastest memory (as far as speed goes) is DDR2 800 (PC2 6400) but for 1GB of that ram its like $230 some per stick
and it needs a compatible mother board to work (which is also expensive)