請大大幫評估一下HP Envy Laptop dv7-7310dx

請大大幫我評估一下這台筆電的C/p值，這台美金大約610左右，現在手邊的筆電不明原因白屏，保固也以過，所以想說直接換一台，剛搜尋到了這一台，想在下手前先請大大幫我評估一下

Product Name dv7-7310dx
Product Number D1A30UA
Microprocessor 2.4GHz 3rd generation Intel Core i7-3630QM Processor with Turbo Boost Technology up to 3.4GHz
Memory 8GB DDR3 SDRAM (2 DIMM)
Memory Slots 2 user accessible
Video Graphics NVIDIA GeForce GT 635M Graphics with 2048MB of dedicated video memory and up to 1664MB total graphics memory
Display 17.3-inch diagonal HD+ BrightView LED-backlit display (1600 x 900)
Hard Drive 1TB 5400RPM hard drive with HP ProtectSmart Hard Drive Protection
Multimedia Drive SuperMulti DVD burner
Network Card 10/100/1000 Gigabit Ethernet LAN (RJ-45 connector)
Wireless Connectivity 1x1 802.11b/g/n WLAN
Sound Beats Audio quad speakers and a subwoofer
Keyboard Full-size island-style backlit keyboard with numeric keypad
Pointing Device Touchpad supporting multi-touch gestures with on/off button
External Ports Multi-Format Digital Media Card Reader for Secure Digital cards & Multimedia cards
3 SuperSpeed USB 3.0
1 Universal Serial Bus (USB) 2.0
1 HDMI
1 VGA (15-pin)
1 RJ-45 (LAN)
1 Headphone-out
1 Microphone-in
Dimensions 1.24 in (min H)/1.39 in (max H) x 16.38 in (W) x 10.79 in (D)
Weight 6.94 lb
Power 120W AC adapter
6-cell 62WHr 2.8 Ah lithium-ion battery
ID Mech Description HP TrueVision HD Webcam with integrated dual array digital microphone
HP SimplePass with integrated fingerprint reader



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還有一問，Win8的電腦灌回win7可以嗎?