In the budget you posted you can customize a dell XPS for your preferences. http://www.dell.com/us/p/xps-l502x/pd.aspx?
The 799 one is the one you want to click, and customize the processor and other things to your liking. Remember that if you need high battery, the better processors and graphics will drain it fast. The most expensive ones just take the 799 and max the items. I suggest maxing what you need yourself.