most laptops come in either 1366x768 or 1920x1080 flavors. for $600 you are most likely going to be stuck with the lower resolution model if you want to keep the hardware top-end.
the asus model i purchased at microcenter was a good deal at around your budget.
i7, seperate video card (not integrated), decent ram... its the model with the ripple scratch resistant finish on the outside and the real aluminum deck inside around the keys.