Originally Posted by Campag4life

You shouldn't throw a 30mm crank under the bus because it only exposes your ignorance about it. You view through your personal lens. There is a guy on here who has broken a DA crank with his weight and power. That guy isn't you or me. A 30mm crank will be both lighter and stiffer than a 24mm crank if designed right. This is based upon moment of inertia and section modulus. A shorter spindle crank like a BB30 will also have greater beam stiffness and again be lighter because the crank spindle is shorter.
All said, I am a big fan of DA cranks. But there is nothing inherently bad about a 30mm spindle...it is directionally correct in fact and why it came into being. It may not be noticeably stiffer for you or for me but a world class sprinter may appreciate it. But it will be lighter and stiffer for everbody.

As to BB30, your choice of Praxis which is a superb BB etc, this is all personal preference. You could easily run a BB30 crank on your bike without regressing it to a heavier and more expensive BSA with a Praxis sleeve. BB30 is fine but only if you can follow basic installation steps and this forum has proven that many if not most can't. But just like loimpact, once they learn, its pretty smooth sailing with BB30, the light gets turned on and generally appreciation for the beauty and simplicity of the design becomes understood.