Tư vấn chọn laptop Sony Vaio F Series, HP dv6t, hay Dell Studio XPS 16 ?

Mình đang không biết nên chọn mua loại nào. Mong các bạn tư vấn giúp mình. Thanks all .

Sony Vaio VPCF1190X
# •Intel® Core™ i7-720QM processor (1.60GHz) with Turbo Boost up to 2.80GHz
# •Genuine Windows® 7 Home Premium 64-bit
# •Black
# •500GB Hard Disk Drive (7200rpm)
# •6GB (4GBx1 + 2GBx1) DDR3-SDRAM-1333
# •Blu-ray Disc™ player
# •Large Capacity Battery
# •Keyboard Backlight
# •16.4" VAIO Premium Display (1920x1080) with NVIDIA® GeForce® GT 330M GPU (1GB VRAM)
==>Order Price : $1619.99

HP dv6t Quad Edition series
# Genuine Windows 7 Home Premium 64-bit
# • Intel(R) Core(TM) i7-720QM Quad Core processor (1.6GHz, 6MB L3 Cache) with Turbo Boost up to 2.8 GHz
# • 6GB DDR3 System Memory (2 Dimm)
# • 500GB 7200RPM SATA Hard Drive with HP ProtectSmart Hard Drive Protection
# • 1GB Nvidia GeForce GT 320M - For i7 Processors
# • 15.6" diagonal High Definition LED HP Brightview Widescreen Display (1366x768)
# • Lightscribe Blu-ray ROM with SuperMulti DVD+/-R/RW with Double Layer Support
# • Webcam + Microphone
# • Intel Wireless-N Card
# • No TV Tuner w/remote control
# • HP Keyboard
# • 12 Cell Lithium Ion Battery (over-sized)
# • No Modem
# • Microsoft(R) Works 9.0
==>Order Price : $1,373.99

Dell Studio XPS 16
# •Full HD Widescreen 15.6 inch WLED LCD (1920x1080) W/2.0 MP
# •500GB 7200 RPM SATA Hard Drive
# •Dell Wireless 370 Bluetooth Module (2.1+EDR)
# •6GB2 Shared Dual Channel DDR3 at 1333MHz
# •Intel© Centrino© Advanced-N 6200
# •Slot Load Blu-ray Disc (BD) Combo (Reads BD and Writes to DVD/CD)
# •Obsidian Black High Gloss Finish
# •McAfee SecurityCenter, 15-Months
# •ATI Mobility RADEON® HD 4670 – 1GB
# •85 WHr 9-cell Lithium Ion Primary Battery
# •Soundblaster X-Fi Hi Def Audio - Software Enabled
# •Integrated 10/100 Network Card
==> Order Price : $1,779.00