Some (hopefully) quick computer build questions :-)

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Building a new box.
Been recommended the AMD FX8150 3.6Ghz Eight-Core in an ASUS Sabertooth 990FX MoBo.

But people keep pointing out to me that Intel is faster.
Is the 8150 worth going with or should I switch to an Intel board and CPU - and if so, which ones do I want?

Video I'm looking at GTX680 4Gb - is there a better choice in that sort of price range ($750)?

Thanks