Another vote for the Sig Kilo2000 or Kilo2200MR. Add a tripod adapter (or just gently clamp the rangefinder in something like a hogsaddle) for lazing longer ranges and you'll be able to range anything you're likely to hit with an RPR.

I've also had good luck with the Bushnell Elite 1 Mile ARC range finder (I prefer it's horizontal profile and it has a built in tripod mounting point on the bottom), but the Sig is just as capable for less money.