I'm in the market for a new laptop. My old 2005 Windows XP (Media Edition) PC is dying out (boot sectors errors). I'm always hearing of building a desktop PC but can the same be done for a laptop?My other option is to look at buying a Lenovo IdeaPad Y580 Laptop - 20994MU for $849.00. This PC will be for video editing, gaming (Steam), and live video streaming (Justin.tv, Twitch.tv). The specs look pretty good:3rd generation Intel Core i7-3630QM Processor( 2.40GHz 6MB)Windows 7 Home Premium 64NVIDIA GeForce GTX660M 2GB8.0GB PC3-12800 DDR3 SDRAM 1600 MHz15.6" HD Glare with integrated camera 1366x768Industry Standard Multi-touch 2 button touchpad1TB 5400 rpmDVD Recordable (Dual Layer)6 Cell Li-PolymerIntel Centrino Wireless-N 2200BGNBluetoothOne year WarrantyHD CameraHDMI (Out)Would this be a good buy or would you recommend building my own laptop or looking a different model/brand?http://shop.lenovo.com/SEUILibrary/controller/e/web/LenovoPortal/en_US/catalog.workflow:item.detail?GroupID=457&Code=20994MU&category_id=AC523278A4F13F27A84F5F5622D1AC7A#.UIml_2_A-4EThanks in advance for your help!