Ahh, so they're 2.5mm longer... Bought one, then a second to match. Still, you are pretty tall. Not Wilt Chamberlain, but not short either.
Depending on how hard you hit it, it may take a little to get used to change, but many people ride on multiple crank lengths on different bikes.
You may need to lower your seat by about 2.5mm (unless it was previously low).
I'd turn off the power meter, and give the new cranks a good shake-down before you decide whether you like them or not.