Again I thank you all for the thoughfull responses, especially Broz, as you obviously have done some work on this.
I am a banker so stats, reference numbers, and ratio's are part of my daily life so I do understand the concept of the smaller beam, but am confused why so many say the Swaro unit is more reliable than the beam divergence number seems to reference. I get that the Swaro may provide an incorrect reading, but why wouldn't the Leica provide any at all when the Swaro will?
Back to the main question in my second post that I do not seem to have an answer to yet. What, if any, other factors play into the consistency of readings, especially at long range, other than beam divergence size. Is there differences in laser quality, or maybe does optical quality come into play?
With this question answered I feel I would be in a position to make a more informed decision.
PS Thanks for some feedback on the costs of the Vectronix units as my google search yesterday showed them much much more expensive.