From what I've seen... (and we see a lot of 'em at the long range school)...
The Bushnell 1600 "Pinseeker" kicks butt. For under 200 dollars on ebay, I'm pretty amazed at how well they do.
Glass isn't even that bad... and it shows angle of sight, right in the display.
I've seen them get reading well beyond 1200 yards, reliably. I don't know how close to 1600 they'll get... but heck, for the money, they're cheaper than any 1200 yard rangefinder I've seen.
And they use standard 9 volt batteries.
Practical Long Range Rifle Courses...
Optimal Charge Weight handload consulting