It shouldn't make any difference as one of the things that T is there for is to keep the string on the nut by maintaining a more acute angle down to the peg. I also vaguely remember something about this also helping tuning.

As far as stopping buzz is concerned a more typical approach is to rase the action of the G a little and that is usually done at the bridge. However setup is also dependent upon the truss rob running under the fret board which determines the amount of curvature or bow on the neck. Loosening the truss rod is often a good way of relieving buzz on the first couple of frets as opposed to messing with the saddles / bridge. i wrote an article on set up in the "studio" category of lessons off the main GT page.