I have the Leupold RRX 1200, but it don't range 1200. 600 yards if I'm lucky, but that's what you get for the mid price range rangefinders. If you don't want extreme long range, its great, plenty of other features.
If you want a range finder that will get out there you're going to have to spend the money.
I was a range officer for a SH LRP match a couple weeks ago. The match was set up so you don't have time to range with a Mil Dot, you had 5 min to find, range and engage 10 targets out to 1200 yards.
We got to talking about range finders and how I tried serveral but didn't find one that would work at extreme ranges.
One guy took me to the parking lot, pointed a single tree on a distant hill side and handed me his Vectronix terrapin, it read in excess of 2800 yards. I never heard any thing bad about it talking to other owners at the match. Its runs about $2000 but I have more then that in range finders that wont do half what they advertize.