First of all WELCOME!
Second, I love hearing someone tell us they bought their Ecoboost with 90 THOUSAND miles on it, and then report it now as 200PLUS! And then if that's not good enough news, you openly declare that the second 100,000 miles weren't easy ones either. "Driving the hell out of it"!!!
That's so cool.
I'm far from the best diagnoser around here (there are some really good ones sure to show up) but needing new turbos on BOTH sides wouldn't be unexpected to me at that mileage. As for the noise you describe, it immediately makes me think exhaust manifold. Far more common for them to not last as long as the turbos.
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