Help with a CAD Laptop

Ok so I have to buy a laptop for this guy at work. The only thing that will be put on this laptop will be SolidWorks 09 and maybe Microsoft office. And I have to have this computer delivered by no later than the 25 of November. Money is of no object (although I don't like to just throw money away on stuff were not going to use) but we need something that looks good. We want to make a good impression on our customers when we take this laptop to show them a SolidWorks presentation. Right now im looking at the Dell Precision M6400. http://www.dell.com/content/produc [...] l=en&s=bsd

Are there any good laptops that I should look at specifically?
Performance is a big issue but I don't know when im spending too much for more performance than I need.
Any suggestions are welcome.
Thanks in advance!

No battery is no issue. Which of these builds is better? There both the same model. Just the more expensive one has got some frills.
4,586

PROCESSOR Intel® Core™ 2 Quad QX9300 (2.53GHz, 12M L2 Cache, 1066MHz FSB) edit
OPERATING SYSTEM Genuine Windows Vista® Business Downgrade, XP Pro SP3 Installed, English edit
LCD 17" UltraSharp™ Wide Screen WUXGA (1920x1200) RGB LED LCD Display edit
WARRANTY & SERVICE 3 Year ProSupport for End Users and 3 Year NBD On-site Service edit
VIDEO CARD NVIDIA Quadro FX 3700M, 1.0GB Discrete edit
MEMORY 4.0GB, DDR3-1066MHz SDRAM, 4 DIMMS edit
RAID CONFIGURATION All Hard Drives, Non-RAID, 1 or 2 drive total configuration edit
HARD DRIVE 160GB Hard Drive, 7200RPM with Free Fall Sensor edit
OPTICAL DRIVE 8X DVD+/-RW Slot Load w/Roxio and Cyberlink PowerDVD™ edit
BATTERY OPTIONS 9 Cell Battery edit
EXTENDED BATTERY SERVICE 2 Years Extended Battery Service for Years 2 and 3 of System Life edit
WIRELESS CARD Intel® WiFi Link 5300 802.11a/g/n Draft Mini Card edit
INTERNAL KEYBOARD Internal English Backlit Keyboard edit
FINGERPRINT READER OPTION No Fingerprint Reader edit
WEBCAM / MICROPHONE Integrated 2.0 MP webcam with dual digital array microphone edit
SYSTEM DOCUMENTATION Resource DVD - Contains Diagnostics and Drivers edit
MODEM No Modem

or this.
4,905

Intel® Core™ 2 Duo X9100 (3.06GHz, 6M L2 Cache, 1067MHZ) Dual Core edit
OPERATING SYSTEM Genuine Windows Vista® Business Downgrade, XP Pro SP3 Installed, English edit
LCD 17" UltraSharp™ WideScreen WUXGA RGB LED Edge2Edge Covet Display edit
WARRANTY & SERVICE 3 Year ProSupport for End Users and 3 Year NBD On-site Service edit
VIDEO CARD NVIDIA Quadro FX 3700M, 1.0GB Discrete edit
MEMORY 4.0GB, DDR3-1066 SDRAM, 4 DIMMS edit
RAID CONFIGURATION All Hard Drives, Non-RAID, 1 or 2 drive total configuration edit
HARD DRIVE 160GB Hard Drive, 7200RPM with Free Fall Sensor edit
OPTICAL DRIVE 8X DVD+/-RW Slot Load w/Roxio and Cyberlink PowerDVD™ edit
BATTERY OPTIONS 9 Cell Battery edit
EXTENDED BATTERY SERVICE 2 Years Extended Battery Service for Years 2 and 3 of System Life edit
WIRELESS CARD Intel® WiFi Link 5300 802.11a/g/n Draft Mini Card edit
BLUETOOTH WIRELESS Dell Wireless® 370 Bluetooth Module edit
INTERNAL KEYBOARD Internal English Backlit Keyboard edit
FINGERPRINT READER OPTION No Fingerprint Reader edit
WEBCAM / MICROPHONE Integrated 2.0 MP webcam with dual digital array microphone edit
SYSTEM DOCUMENTATION Resource DVD - Contains Diagnostics and Drivers edit
MODEM No Modem

they both have the same or vary similar screens. This one I think: 17" UltraSharp™ Wide Screen WUXGA (1920x1200) RGB LED LCD Display

sorry about the mess I just copy and pasted

(I duno if this is true or not) I thought I had heard that SolidWorks was not written for multi-core processors. So wouldnt that mean its better to get a fast dual core instead of a medium speed quad core?

The cheaper one would do the job, though not as well. The one I would go for is the quad core one, as it would probably have the best all around performance, but any of them would work just fine.