I think that the changes you have selected are good. It will give you a bit more bang for your buck without really changing the performance of the system. The ssd is a good one, 670 and 3570K are a great combination for gaming. What's the price of the vesta system? You should consider buying the parts yourself on their site and then select the option for NCIX to assemble the system (50 bucks i think). It may save you a buck or two for basically the same thing.
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