theoretical physics and applied physics are two different things. I'm basing my opinion on a few thousand hours of airflow testing on a flow bench. That, and the fact that in some tests indicate that larger pumps, larger rads, larger hoses, in a high flow system, they only yield 1-2 degrees better temps. Either due to the pump heat, or you've gotten to the point of diminishing returns.
All I'm saying is that I haven't seen enough data yet to draw a conclusion. In the case of the OP's, physics said adding an additional rad, faster fans, and moving the rads outside would give lower temps, in his case it didn't.
It's not just the parts used, but how they work together that gives the end result.
Before SteveRo's testing there were a lot of high flow believers swearing up and down that the Boreas wouldn't work for one reason or another. Yet that low flow system produced better results than his high flow system ? Sure it had low wattage air cooled TECs. But the end results are similar, and so is the price point.