there is a BIOS update that fixes cpu throttling issues on battery.
you can use intel extreme tuning utility to get more performance and/or less heat from the CPU.
a lot of people prefer to remove asus splendid utility and instead rely on nvidia control panel for color settings.
you can use ASUS Backtracker to create a restore drive for the laptop in case you decide to upgrade your storage.
also, check build quality. make sure there are no noticeable gaps between panels, the hinge under the screen, and that the top of the cooling section is properly attached to the keyboard area.
murder any preinstalled antivirus and go for something free like avast.
ASUS G750JX -- i7-4700 - 16GB - 128GB 840 PRO SSD + 1TB HDD - Nvidia GTX 770M - 120Hz 3D glossy display