I didn't check Intel but if you want to compare with AMD:
http://www.amdzone.com/modules.php?op=modload&name=News&file=article&sid=8453
Opteron 2344 Directron $236
Opteron 2346 Directron $289
Opteron 2347 Directron $356 Computer HQ $344.67
Opteron 2350 Directron $438
Opteron 8346 Directron $786
Opteron 8347 Directron $886 Buy.com $910.99 PCs For Everyone $939
PC Connection $925.56
TheNerds.net $823.67
NextWarehouse $892.42
Opteron 8350 Directron $1,146
You will need a board for Barcelona, and Tyan is the only company stepping up right now.
Tyan S2932 Chumbo $469.99
Atacom $444.95
Newegg $469.99
Tyan S3970 Buy.com $232.99 Next Warehouse $234.31.02 Atacom $229.95
Tyan S4980 4 socket Computer Giants $798.18 Atacom $754.95
Newegg $789.99
Tyan S4985 4 Socket Next Warehouse $955.24 Newegg $1,169.99 PC Nation $955.35 free shipping