Windows 7: WD to buy Hitachi GST

Computer type PC/Desktop
System Manufacturer/Model Number Home Built
OS Windows 7 HP 64bit, Windows 8 Pro w/Media Center 64bit
CPU Phenom II X6 1100T
Motherboard ASUS M5A99X EVO
Memory Crucial Balistic 8gb DDR3-1866 CL9
Graphics Card MSI R6850 Cyclone IGD5 PE
Sound Card On Board
Monitor(s) Displays ASUS VE258Q 25" LED with DVI-HDMI-DisplayPort
Screen Resolution 1920 x 1080

Keyboard Logitech K120
Mouse Logitech Marble Mouse USB, Logitech Precision Game Pad
PSU Seasonic X650 80 Plus GOLD Modular
Case Corsair 400R
Cooling Antec Kuhler H2O 620, Two 120mm and four 140mm
Hard Drives Two WD Cavier Black 2TB Sata III, WD My Book Essential 2TB USB 3.0
Internet Speed 15MB
Antivirus Norton IS 2012, Malwarebytes Pro
Browser IE-10, FF-19
Other Info APC UPS ES 750, Netgear WNR3500L Gigabit & Wireless N Router with SamKnows Test Program, Motorola SB6120 Gigabit Cable Modem. Brother HL-2170W Laser Printer, Epson V300 Scanner

System Manufacturer/Model Number Custom built
OS Windows 7 Ultimate 64 bit
CPU AMD Phenom II X4 965 Black Edition
Motherboard Gigabyte GA-MA790X-DS4
Memory GSkill 4 X 2 GB PC 8500
Graphics Card XFX Radeon HD 6790 D
Sound Card On board RealTek HD
Monitor(s) Displays Dual monitors:Samsung SyncMaster S20B300
Screen Resolution 1600 X 900

Keyboard Logitech G510
Mouse Razor DeathAdder
PSU Ultra X4 750 watt fully modular
Case Thermaltake Overseer RX 1 full tower
Cooling Core-Contact 92 mm CPU Cooler
Hard Drives Seagate Barracuda 1TB (primary) Seagate Barracuda 2 X 320 GB
Internet Speed 50/5 Mbps UL/DL
Other Info Optical: Super Muliti DVD burner w/lightscribe, Hauppauge WinTV HVR-1800