Can you let us know if you already have parts that you intend using such as an operating system, screen, keyboard, mouse or DVD/CD drive as examples.
For a quick reference see my post #18 @ http://www.geekstogo...ve/page__st__15
with your budget the list at the link will allow you to fit the best video card out there at the moment the GTX 580 http://www.newegg.co...N82E16814130751
see http://www.videocard...GeForce GTX 580
however if you are looking at serious video editing (as a profession/career) you should also consider a workstation type card such as http://www.newegg.co...N82E16814133382
as opposed to a card aimed more at gaming.
Tutorials to help you with your build courtesy of Troy/Artellos http://www.geekstogo...r-own-computer/
and Digerati respectively http://www.geekstogo...rface-material/
I hope this helps and if you have any questions please let us know.DarkByte
After offering the above guidance I see that you post the exact same request for assistance on 05 January 2012 - 09:30 PM and colleague iammykyl assisted you http://www.geekstogo...ter-first-time/
please do not leave the previous thread hanging either continue there or acknowledge the good advice you received and conclude the topic and we can continue here, thank you for understanding.
NB: From my signature;Staff and Members give their time freely to help others, please be courteous and conclude your topic if assistance is no longer required.
Edited by phillpower2, 22 April 2012 - 11:26 AM.
Additional guidance added.