Lenovo, Acer hay Dell???

Mình đang muốn mua 1 cái laptop mà đang phân vân giữa 3 con này, không bít nên chọn cái nào thì OK. Xin mọi người cho ý kiến:

1. Acer Aspire 4736G-742G32Mn.058(13,350,000 VNĐ)
Core™2 Duo P7450 (2*2.13GHz,1066MHz FSB)/ 3MB cache/ 2GB DDR2/ 320GB HDD/ Nvidia Geforce G105(512MB of Delicate DDR2) DVDRW/ 14" WXGA LED Backlight 16:9 CineCrystal™/ FingerPrint/ HDMI/ Bluetooth/Wireless/ Camera/ Card Reader Pin 6 Cells/ Weight 2.3 Kg/ Wifi a/b/g/n - Made in China
2. Acer Aspire 4736-752G32Mn.089(13,450,000 VNĐ)
Core™2 Duo P7550 (2*2.26GHz,1066MHz FSB)/ 3MB cache/ 2GB DDR2/ 320GB HDD/ Intel® GMA X4500MHD up to 512MB share DVDRW/ 14" WXGA LED Backlight 16:9 CineCrystal™/ FingerPrint/ HDMI/ Bluetooth/Wireless/ Camera/ Card Reader Pin 6 Cells/ Weight 2.3 Kg/ Wifi a/b/g/n - Made in China
3. Lenovo IdeaPad Y450 - Black Keyboard (5902-2879)(13,199,000 VNĐ)
Core 2 Duo T6600 (2x2.2GHz )/ 2MB Cache / 2GB DDR3 / 320GB HDD / 14.1" LED Backlight LCD/ HDMI/ VGA Intel GMA X4500MHD up to 512MB shared/ DVD-RW DL / NIC / Touchpad Mouse / Camera/ eSATA/Bluetooth / 6 in 1 Card Reader/ Weight 2.2Kg / Wireless 802.11b/g/n - Made in China - Thiết kế trẻ trung thời trang - bàn phím đen tuyền sang trọng - dãy phím cảm ứng đa chức năng sành điệu - LCD đèn nền LED
4. DELL VOSTRO Vostro 1014(C943T) Obsidian Black(13,199,000 VNĐ)
Intel® Core™ 2 Duo T6670 (2*2.20GHz, 2MB L2 cache, 800MHz FSB)/4GB DDR2-800 /320GB SATA/Intel® GMA X4500MHD (share)/14.0''WLED TrueLife 1366*768 HD 16:9/ 4*USB2.0, IEE1394/ Express Card/34/56K V.92 Gigabit Bluetooth Dell802.11bgn/DVD±RW /5 in1 Card /2.0MP WebCam/ 2.2kg 1.1inch/Linux Ubuntu /6cell 3.0hours.

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