Hi, is anyone, particularly quad users, considering either of these 12GB memory kits? Kingston 12GB (3x4GB): ($405) http://shop.kingston.com/PartsInfo.asp?ktcpartno=KVR1066D3Q8R7SK3/12G Crucial 12GB (3x4GB): ($560) http://www.crucial.com/store/partspecs.aspx?IMODULE=CT3KIT51272BB1067 Apparently the Xeon 35xx/55xx series will support Registered DIMMs just fine. If you buy the Kingston, they have a 30-day money back satisfaction guarantee so it's no risk... I'd do it, but I'm in Canada and it's just more hassle/cost. It would be great for someone to order this kit and try it out in a Quad core. Worst case you're out some shipping.