I was just messing around on Dell's site, here is the closes I could configure there computer to a Mac.
Dell Precision T7400 64bit Memory Riser:
PROCESSOR Quad Core Intel® Xeon® Processor X5472 (3.00GHz,2X6M L2,1600)
2ND PROCESSOR Quad Core Intel® Xeon® Processor X5472 (3.00GHz,2X6M L2,1600)
OPERATING SYSTEM Genuine Windows Vista® Ultimate Service Pack 1, with media, 64, ENG
VIDEO CARD 256MB PCIe x16 nVidia Quadro FX570, Dual Monitor DVI Capable
MEMORY 2GB, DDR2 SDRAM FBD Memory, 800MHz, ECC (2 DIMMS)
OPTICAL DRIVE 16X DVD+/-RW w/ Cyberlink PowerDVD and Roxio Creator Dell Ed
RAID CONFIGURATION C1 All SATA drives, Non-RAID, 1 drive total configuration
HARD DRIVE 320GB SATA 3.0Gb/s,7200 RPM Hard Drive with 8MB DataBurst Cache
My Services & Warranties
WARRANTY & SERVICE 3 Year Limited Hardware Warranty with Next Business Day On-Site Service edit
Starting Price $5,173
Instant Savings $200
Subtotal $4,973
Apple Mac Pro:
Two 3.0GHz Quad-Core Intel Xeon
2GB (2x1GB)
320GB 7200-rpm Serial ATA 3Gb/s
ATI Radeon HD 2600 XT 256MB
One 16x SuperDrive
Apple Mighty Mouse
Apple Keyboard + User's Guide
AppleCare Protection Plan for Mac Pro (w/or w/o Display) - Auto-enroll
Cart Subtotal:$3,848.00