I'm considering ordering a custom titanium 650b frame that I plan to keep for a long time. Should I go with a 73mm standard bottom bracket or a PF30 bottom bracket? To a reasonable degree, I am willing to sacrifice weight and/or stiffness for durability and long term compatibility. I am 220 lbs with gear. I can be a pedal masher at times.

Which one should I go with and why?

Thanks in advance.