Wait for the new dv6 range with the 650m if you have to spend 70k+. I guess that's where it should be priced.
The samsung 550p you can get for 56-57k and has amazing specs for mid-high level gaming.
3rd gen i7.
8 GB RAM @ 1600 Mhz.
1 TB HDD.
Nvidia GT 650M (DDR3 though, not DDR5).
15.6" screen with 1600X900 display.
2 year warranty.
Doesn't the N55 have the GT 635M? Its outclassed by the 650.