That's a nice set, I look forward to seeing how well the stiffer rings with pins and ramps shift.
Realistically, it's kind of crazy that VO is having even three distinct lengths made, with 165, 170, and 175. Quite a few cranks nowadays use one forging and just drill the pedal hole in a different spot for different lengths. To keep this crank classic looking, that would have been too much of an aesthetic compromise.
I'd buy a 172.5mm if they existed, but that doesn't mean I won't pick up a 175mm instead.