In all seriousness it would be very interesting to see the final pricing if it is indeed comparable to the standard crank price ($1200-$1500?), there would be no reason not to get one. When you think about it all the designs and R&D is done by companies such as HKS and Tomei. Get one of their cranks and copy it...
I voted 73.7mm, can't get passed the HiOctane R32 and its full counterweight Tomei crank nessled in a GT block!