These days your $800 budget is going to get a excellent all-round laptop and the ability to run WoW on Med settings.
HP Pavilion dv7t series with a base price of $650 http://www.shopping.hp.com/webapp/shopping/computer_series.do?storeName=computer_store&category=notebooks&series_name=dv7t_series
A CPU upgrade to Core i5 460M and a grapics upgrade to ATI HD 5650 will take the price up to your $800 budget.
You'll get a free upgrade to 6GB of RAM and a 17.3" 1600x900 resolution LCD.
You could stick with the standard Core i3 i3-380M and the HD 5470 video card upgrade and get low range Med WoW settings for about $700