Thanks all,
I'll definately check out the links. My primary concern is the ability to shift (I'll be shooting both architecture and landscape), also, being a 24mm lens, DOF is pretty deep from the outset. But it would be great being able to get very deep depth of field already at f/8 (around this lens' optimum aperture I'm told, and still somewhat safe from visible diffraction). Also, something being within the DOF obviously isn't the same as that something being at, or very close to, the actual plane of focus. But, I really appreciate the info guys, I'll look into it presently, thanks again.