Choice of two systems

Hi there, I have a choice of two systems to upgrade to listedbelow. We do assemblies of about 10,000 parts including all thehardware on Solidworks 2008 & will be upgrading to 2009. I'mhearing that the Xeon's are not the way to go. Which system willwork better on large assemblies?

Dell T3400
Intel Core2 Quad 2.4GHz Processor
2 Gigs RAM
nVidia Quadro FX570, 256MB
80GB SATA Hard Drive
WinXP Pro

HP XW8200
Dual Xeon 3.4GHz Processorss
4 Gigs RAM
nVidia Quadro FX3400, 256MB
73GB SCSI 15000 RPM
WinXP Pro

Thanks
WayneSolidworksAdministration