Buddy Ken, its simple yet complicated deciding between the two -
Simply put the Dell will give you a better gaming experience and 3D gaming will be more enjoyable but still not upto the mark ( you need at least GTX 560M and up for smooth 3D gaming)
But if it is entertainment you are after then nothing beats F217HG. It has the best laptop screen money can buy (anywhere in the world, not just India) the best 3D experience outside of an IMAX 3D theater, (no 3D laptop/desktop monitor/3D HDTV can beat its 3D performance)
The screen in 2D easily rivals many decent LCD/Plasma HDTVs (Plasmas also as it has an OCB LCD so viewing angles are perfect. No matter which angle you look there is no image degradation.)
Read these reviews
Review
Review 2
So if only entertainment and light gaming is what you need then get the Vaio, if you want better gaming pedigree then get XPS 17. If you want smooth 3D gaming then go for Asus G74SX 3D. Its priced around 1.15 lacs. (Officially sold in India, no need to import or anything)
Otherwise as Pratik mentioned build a 3D gaming desktop.