The best? Depends on what your criteria for "best" is. Price, noise, overclocking, size, there could be a lot of different answers to this. The only thing I can reasonably say is that the "best" is probably not the Founders Edition.
Is it worthwhile with a 4690? If you mean will a 4690 bottleneck the card, it's worthwhile in that respect, and it's not like you can get a CPU that's going to be appreciably faster than what you already have.
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