I'm building a new PC for web browsing, re-encoding movies for my daughter's ipad, watching movies (1980x1080) & very light gaming. I've already bought the following: Processor: I5-3570k Motherboard: Gigabyte GA z77m-d3h Ram: 16 GB DDR3 1600 Hard Drive: Samsung 840 Pro 256 GB Power Supply: Corsair 430W PS Case: Thermaltake V3 Optical Drive: Lite-On Blu-Ray/DVD My question is, would there be any benefit to getting a discrete gpu? I'm just concerned with super smooth web scrolling, video streaming and maybe some very light gaming for my daughter. Would the HD 4000 on my processor be all I need? Thanks!