At present I believe that if you are a gamer your better off going for a high end single core chip, but as developers begin to write there games to support dual cores this will change.
The mesh has 2gig of RAM which will stand you in good stead and its still an SLI motherboard so you can add another GPU when you ready.Remember thou that it has to be exactly the same card same BIOS.
Out of the 2 myself I think id go for the mesh offering. Given that they are both about the same money, the mesh will give you a longer life I think. eg a bit more future proofed
3yr warrenty as well which is handy.