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Kenkits is correct regarding the reduced features on the Nov'13 production Verna. I read those features are now back again after the price change.
The hyundai site doesnt mention any new SX(O) VTVT AT variant anymore. Its better you inquire with the dealerships, but do remember they will push you towards an immediate sale regardless of variant.
If you are keen on taking the top end model due to the presence of the additional features, then I guess you dont have much of a choice at the moment. Now assuming you opt for the SX variant, as far as I know, you can add better aftermarket projectors and leather upholstery, but I am not sure about the push button start and keyless entry.
PS: Regardless, that variant at 1lac less is a sweet deal.