how big the difference is between g53sw and np8130?
They are practically identical except:
Newer video card in NP8130 (GTX 560m) vs G53SW (GTX 460m)
More RAM NP8130 (8 GB) vs G53SW (6 GB)
NP8130 also has Matte finish to their screen, where as ASUS is glossy.
Otherwise, they practically same.