This is true,, I'm more thinking along the lines of, the -5's make over 400rwks, will the larger 63mm GTX versions be able to make a meaningful amount more again.
If it is 10kw's then it would hardly be worth it
I do think these would go well on an SR/CA etc, would be a good in between setup for those who want more than a 2860, but don't want the lag of a 2871