2800:

https://www.eurooptic.com/Leica-Rangemaster-CRF-2800COM-Laser-Rangefinder-40506.aspx

2700b:

https://www.eurooptic.com/Leica-Rangemaster-CRF-2700-B-40545.aspx

2400:

https://www.eurooptic.com/Leica-CRF-2400-R-Rangemaster-Compact-Laser-Rangefinder-40546.aspx

In a nutshell, the 2400 will suit your purposes and then some. The 2700 has a sd card for ballistics, and a hair smaller beam divergence. The new 2800 is bluetooth compatible.

I kept buying the new models because I was outshooting their capabilities. After finding the 1600 wouldn't range as far as I needed, I bought a Terrapin.

When Leica came out with the 2000, I bought one, because I wanted to sell the Terrapin due to their schitty CS if something went wrong. I bought a Sig in that time frame to compare as well, but kept the Leica, sold the Sig. The 2000 still sucked for my needs, so I kept the Terrapin.

When Leica came out with the 2700, I bought one right away, and was immediately impressed enough that I sold the Terrapin. The extra features didn't matter to me, I just wanted a rangefinder that worked, & it does. Like I said earlier, I then bought the 2400 to keep in my pack, and leave the 2700 in the truck. I could live with two 2400's if they would have come out first, they're that close.