Help deciding between 3 laptops

Hi guys. I need help deciding between these laptops for which is better.
($2427)
PROCESSOR 2 Duo T9800 (6MB cache/2.93GHz/1066Mhz FSB)
HD DISPLAY Edge-to-Edge HD Widescreen 16.0 inch WLED LCD (1366x768) W/2.0 MP
MEMORY 6GB DDR3 SDRAM at 1067MHz (2 Dimms)
HARD DRIVE 320GB 7200 RPM SATA Hard Drive
VIDEO CARD ATI Mobility RADEON® HD 3670 - 512MB
WIRELESS CARDS Intel® 5300 WLAN Wireless-N (3x3) Mini Card
SOUND OPTIONS High Definition Audio 2.0
BLUETOOTH Dell Wireless 370 Bluetooth Module (2.1+EDR)

($2633)
Processor 2 Duo T9500 (2.6GHz/800Mhz FSB/6MB cache)
MEMORY 6GB Shared Dual Channel DDR2 SDRAM at 800MHz (2 Dimms)
HARD DRIVE: 250GB 7200rpm SATA Hard Drive Free Fall Sensor
VIDEO CARD NVIDIA® SLI™ Dual GeForce® 9800M GT 1GB GDDR3
WIRELESS CARDS Intel® PRO/Wireless 4965a/g/n Mini Card
BLUETOOTH Built-in Bluetooth capability (2.0 EDR)
BATTERY OPTIONS 85 WHr Lithium Ion Battery (9-cell)
SOUND OPTIONS High Definition Audio 2.0

($2169)
2 Duo T9550 (2.66GHz/1066Mhz FSB/6MB cache) edit
HD DISPLAY 15.6” Full High Definition (1080p) High Brightness LED Display with TrueLife™ and Camera
MEMORY 8GB Shared Dual Channel DDR2 at 800MHz
HARD DRIVE Speed: 320GB SATA Hard Drive (7200RPM) with Free Fall Sensor
VIDEO CARD 512MB ATI Mobility Radeon HD 4570
INTERNAL OPTICAL DRIVE 8X Slot Load Super Multi (DL DVD+/-R Drive + RAM support)
WIRELESS CARDS Intel® WiFi Link 5100 802.11agn Half Mini-Card
BLUETOOTH Dell Wireless 370 Bluetooth Internal (2.1)
BATTERY OPTIONS 85 WHr Lithium Ion Battery (9 cell)
SOUND OPTIONS High Definition Audio 2.2


so would sacrifing 2.66 processing speed from 2.93 be worth the 9800gt 1gb ddr3