Easy questions

[Phippsp]

two 512mb sticks of ram?

or

Just 1 1gb stick of ram?

proble going with Geil type of memory this is what I was going to get...
http://www.gameve.com/gve/Store/ProductDetails.aspx?sku=MMN-GEIL-041

any suggestions on another type of memory that I should consider

 

[4W4K3]

2*512B...Dual Channel will give you a boost in bandwidth and possibly a noticable boost in performance.

That is Value RAM, and for the perofrmance i think it's way overcharged.

http://www.newegg.com/app/ViewProductDesc.asp?description=20-141-152&depa=1

Those seem to overclock very well on alot of A64 rigs, and are lower than your price range. I would look for those or something very similiar (TCCD chips and Brainpower PCB)