I ended up taking the car to a Nissan Dealership. They had it for about an hour, they also did a 20+ min road test, and data logged, which the Head Tech did finally get it to replicate the problem. He even uploaded the data to another tech at Nissan, after everything, going over AFRs, every sensor, mechanical etc, its completely normal, and there's nothing wrong with my car. Every sensor was/is reading fine and there's nothing mechanical setting off the knock sensor.
Apparently it does say in our manuals spark knock under light acceleration OR uphill is completely normal. The tech said I hear it a lot louder do to the open-element intakes. I explained I've just never heard of a $40,000+ sports car doing that, but he said it's only under light acceleration or uphill to increase fuel efficiency.
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