CS:GO or 1.6?

[velocity]

You meant DoTA2?
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CS:GO
CS:S was bad for me(just opinion)
1.6 IS dying, and playing cs:go feels like cs1.6 with upgraded graphics and some new weaps and stuff.

I never played CS:S because I had some friends that played professionally and they always said the only reason they play CS:S is because they had a contract with G4 TV, and G4 needed the upgraded graphics CS:S offered. After that contract lifted all of the pro players went back to CS 1.6 until CS:GO came out.