DELL ALIENWARE M17XR3 LAPTOP
Intel Core i7-2860QM Processor 2.5GHz(3.6GHz with Turbo Boost,8MB Cache)
Genuine Windows 7 Ultimate 64bit(SELF INSTALLATION REQUIRED)
750GB 7200RPM Hard Drive
750GB 7200RPM 2nd Hard Drive
16GB 1333MHz DDR3 SDRAM(4x4GB)
DVD+/-RW
Integrated 5.1 Stereo Sound
2GB GDDR5 NVIDIA GeForce GTX 580M"
Internal 10/100/1000 Gigabit Ethernet
Dell Wireless 1501 802.11b/g/n
Dell Wireless 375 Bluetooth Internal mini-card
Soft Touch-Stealth Black
17.3""(43.94cm) Full HD(1920x1080) WLED LCD Panel
3.2 MP Integrated WebCam
Alienhead 3D / AlienFX AQUA
9-cell Primary Battery
DELL ALIENWARE M17XR4 LAPTOP
Intel Core i7-3820QM Processor(2.7GHz with Turbo Boost 2.0 up to 3.7GHz,8MB Cache)
Genuine Windows 7 Home Premium 64bit(SELF INSTALLATION REQUIRED)
32GB mSATA MiniCard(Caching)
750GB 7200RPM Hard Drive
8GB 1600MHz DDR3 SDRAM(2x4GB)
8X DVD+/-RW Drive with DVD+R double layer write capability
Integrated Digital 7.1 Surround Audio Support
2GB GDDR5 Nvidia GeForce GTX 660M
Integrated 10/100/1000Mbps Gigabit Ethernet NIC
Intel Centrino Wireless-N 2230 With Bluetooth 4.0
Stealth Black with Soft Touch Finish
17.3"(43.94 cm) WideFHD(1920x1080) WLED LCD
FullHD Camera with dual digital microphones
Alienhead 3D / AlienFX AQUA
9-cell Primary Battery
1 Year Warranty
both have the same price, the question which one should i buy. help, thnks ;/