You will probably need a faster CPU more RAM and better graphics card to run a complicated game than you are likely to need for video editing at the 'home' level. Video editing uses plenty of drive space and - because it takes you time to view your 'footage' - less CPU/RAM. However, when you have completed the edit process and wish to create your AVI file the CPU ans RAM loading increases dramatically. As a result I would suggest you consider carefully the best CPU/RAM relationship within your budget.
You may find this article also helps your decision process for video editing.