Shooting Tethered, was: What white balance method do you use?

<snip>
I don't trust a light meter. I check my picks and check my exposures so I
know what I'm getting.
</snip>

Pat: Maybe the group can suggest some solutions that would improve my
workflow in this area; I've never found quite the magic.

I would like to connect my Canon 5D to my Macbook so I can see the image on
the Macbook right after I fire the shutter release. If I could also see
the histograms, that would be great. And even better if I could select
part of the image and see the histograms for the selection.

Does anybody have a successful experience doing this?

Thanks, ~Ray
.