Well, from what you said you wanted to use it for, the new HP Envy seems just right.
Its on sale right now for $100 off, making it $599.99.
its a 320GB 4GB ram laptop with a large HD screen and amazing battery life.
Windows 7 64bit. Laptops | HP® Official Store
Thats if you want to push your budget to the limit. otherwise, at $580 (also $100 off) you can get this laptop with 750GB HDD and 6GB Ram. http://shopping.hp.com/en_US/home-of...nt-Notebook-PC
This one comes with Beats audio system and supposedly 9.25 hours of battery life.
Or the G7, one step ahead of my laptop.
comes with a HUGE 17.3" HD screen,6 GB DDR3， and 640 GB SATA (5400 rpm) http://shopping.hp.com/en_US/home-of...nr-Notebook-PC