Which 2 gig RAM kit (OCZ)?

[DCR]

Hey all,

I plan to get a DFI board and an Opteron or X2 AMD chip, and run SLI at some point.

I have been part shopping, and saw some great memory deals.

Is there any issue running this RAM in a DFI board, and if not, which is the best? I am assuming the 3rd link is, but I am not really sure.

2 GB (2x1GB) DDR2 (667) PC2-5400 OCZ Gold $144.62 After Rebate

http://www.monarchcomputer.com/Merchant2/merchant.mv?Screen=PROD&Store_Code=M&Product_Code=140424

2 GB (2x1GB) DDR (500) PC-4000 OCZ Gold $148.62 After Rebate

http://www.monarchcomputer.com/Merchant2/merchant.mv?Screen=PROD&Store_Code=M&Product_Code=140363


2 GB (2x1GB) DDR PC-4000 (500) OCZ Platinum $165.62 After Rebate

http://www.monarchcomputer.com/Merchant2/merchant.mv?Screen=PROD&Store_Code=M&Product_Code=141226