Sony Vaio VPC-S13SGX/ZI/ Intel Core i5-480M 2.66GHz/ 4GB DDR3/ 500GB HDD/ 13.3 inch Wide (HD 1366 x 768) LED backlight/ VGA NVIDIA GeForce G 310M/ No/ yes/ Integrated 10/100Base-T Ethernet LAN/ yes/ Wifi 802.11bgN/ Windows 7 Home Premium 64 bit/ 1,72 kg/ 9cells/ [sound]Integrated/[sound] Standard Version 2.1 + EDR/Built-in Camera, 640x480 effective pixels/10/100/1000BASE-TX Ethernet with RJ-45 interface/Built-in Fingerprint Sensor /Standard Duo Memorystick & SD/MMC compatible/USB 3.0x2, USB 2.0x1, HDMI out (3D supported)/

SONY VAIO VPC-Z212GX/B/ Intel® Core™ i5 - 2410M 2.3GHz with Turbo Boost Technology up to 2.9GHz L3 Cache 3MB/ 4GBDDR3 Bus 1333MHz/ 128GB SSD Solid State Drive/ 13.1 inch Back Light TechnologyLED/ VGA AMD Radeon™ HD 6650M 1GB Dedicated/ External Power Media Dock™ with slot loading CD/DVD Player / Burner/ Yes/ Integrated 10/100Base-T Ethernet LAN/ build in Webcam and Microphone/ Intel® 802.11b/g/n/ OS Genuine Windows® 7 Professional with Service Pack 1 64-bit/ 1,16 kg/ 9-cell lithium-ion battery/ [sound]Integrated /[sound] 3 USB / 1 external VGA monitor / 1 HDMI / 1 stereo microphone in / 1 stereo headphone / line-out 1 AC power / 1 RJ-45 / 1 eSATA / USB 2.0 Combo/

Lenovo ThinkPad W520 (4276-39U) / Intel® Core™ i7-2820QM (2.30GHz, 8MB L3, 1600MHz FSB)/ 8GB DDR3/ 500GB 7200rpm HDD/ 15.6 inch 1920x1080 LCD/ nVidia Quadro 1000M 2048MB Dedicated/ DVDRW +/- Double Layer/ Yes/ Integrated 10/100Base-T Ethernet LAN/ Built-in webcam and microphone/ Intel 802.11agn/ Windows® 7 Professional 64bit/ 2.5kg/ 9cell/ [sound]Integrated/[sound] 3 USB /1Gb Ethernet,Webcam & Microphone,Bluetooth,Fingerprint reader , WiFi NIC 56K Modem/

Lenovo ThinkPad W520 (4276-38U) / Intel® Core™ i7-2720QM (2.20GHz, 6MB L3, 1600MHz FSB)/ 4Gb DDR3/ 500GB 7200rpm HDD/ 15.6 inch 1600x900 LCD/ nVidia Quadro 1000M 2048MB Dedicated/ DvDRW+/- DoubleLayer/ Yes/ Integrated 10/100Base-T Ethernet LAN/ Built-in webcam and microphone/ ThinkPad b/g/n/ Windows 7 Professional/ 9cell/ [sound]Integrated/[sound] 3 USB /1Gb Ethernet,build inWebcam Microphone, Intel 802.11bgn wireless, 4.84lbs/

Lenovo Thinkpad T520 4240-48U / Intel® Core™ i7-2620M (2.70GHz, 4MB L3, 1333MHz FSB)/ 4Gb DDR3/ 500GB 7200rpm HDD/ 15.6 inch 1600x900 LCD/ nVidia Quadro NVS 4200M 1024MB Dedicated/ DVDRW +/- Double Layer/ Yes/ Integrated 10/100Base-T Ethernet LAN/ Built-in webcam and microphone/ ThinkPad b/g/n/ Windows 7 Professional/ 9cell/ [sound]Integrated/[sound] 3 USB /1Gb Ethernet,build inWebcam Microphone, Intel 802.11bgn wireless, 4.84lbs/

Lenovo Thinkpad T520 4240-48U / Intel® Core™ i7-2620M (2.70GHz, 4MB L3, 1333MHz FSB)/ 4Gb DDR3/ 500GB 7200rpm HDD/ 15.6 inch 1600x900 LCD/ nVidia Quadro NVS 4200M 1024MB Dedicated/ DVDRW +/- Double Layer/ Yes/ Integrated 10/100Base-T Ethernet LAN/ Built-in webcam and microphone/ ThinkPad b/g/n/ Windows 7 Professional/ 9cell/ [sound]Integrated/[sound] 3 USB /1Gb Ethernet,build inWebcam Microphone, Intel 802.11bgn wireless, 4.84lbs/

MSI GT640-MS 1656 044VN / Core i7-720QM 1.6Ghz/ 6Mb/ 4Gb DDR3/ 500Gb/ 15.4 inch WSXGA/ Geforce GTS 250/ BluRay Camera HDMI/ Yes/ Integrated 10/100Base-T Ethernet LAN/ Built-in webcam and microphone/ 802.11a/b/g/n/ Win7 Home Premium / 2.7kg/ 9cell/ [sound]Integrated/[sound] 3 USB / 1 external VGA monitor / 1 HDMI / 1 stereo microphone in / 1 stereo headphone / line-out 1 AC power / 1 RJ-45/Black/Red/