good FHD, 660M, 8GB DDR3, bluray player, backlit keyboard, now for 950$ - really good price
2. the G75VW has a superior cooling system which is good, but not necessarily what you need. The temps of the Y580 and others are not that bad at typical conditions and under typical load.
does it worth it? I think 200-250$ more are too much for it. Buy a cooling pad and watch temperatures.
The asus is a better machine the ge is cheaper and the lenovo is worse. The asus should have a backlit keyboard, but the res is only 1600x900. The asus case should be equivalent to the gt70 not the ge70. My recommendation would be the ge.