We'll see. First off, I'd like to thank you for not being a jackass and contributing to a healthful debate, not taking any of my opinions to heart.

Setup B may get better gas mileage. Or maybe you only want so much power; any more and you'd kill yourself. Maybe you like setup B visually better; less engine bay clutter, whatever. Not saying that having two turbochargers will give you even better gas mileage, or that the only way to go insane on power is more boost/turbos, not to mention having two adds even more engine bay clutter.

I am a loner. I have time to go into my car, stare at something for a bit, then tilt my head and look at it again. Complications dont bother me, I rather like a small challenge. I'd have time to insulate the turbos, exhaust manifold, intake, intercooler piping, etc.

In the end, I suppose subconsiously I'd rather say I have two turbos, and I'm just trying to back that up.