For prairie dogs and long range "ranging" - for accurate repeatability, if used correctly, the Swarovski & Leica are the brand leaders right now in the commercial field at "reasonable prices".
When considering range finders you might consider targeting reticle size and beam divergence in considering your choices. You want the tightest collimated beam possible.
Not sure what they are as of today, but the last I knew the Swaro had a divergence of 2.0 millirads both horizontal and vertical, which is very good for long ranging accuracy.
The Leica is better in some respects as its beam divergence is 2.5 millirads horizontally but only 0.5 vertically.
Both have great error-correcting software but the Swaro will reach out a tad more at longer distances than Leica but the Leica will be a tad better say to 900/1,000 yards but the downside is you really have to have a steady hold or you'll miss the target either high or low due to Leica's precise control of the vertical beam.
For long range prairie dog ranging, I'd go with the Leica and range the mound, as that dog with a large circular targeting reticle will be a bit difficult to hit accurately with that laser beam.
I've got the Sig 2000 and its good for my purposes but if I needed something for 800/1,000 yards on a smaller target besides a barn - I think I would look to pick up a used Swaro or 1200 Leica. Just my &0.02 worth.