I have used Leupold, Bushnell, Vortex Swaro, Leica but no Sig. I currently own 3 Leica, two CRF, 1200 and 2000, and a Geovid 8x42 HD. Nothing is in their league for a hunting RF let alone the quality of the glass. I never carry Binos when walking, only the CRF in my shirt pocket, unless I am in the mountains glassing all day. I use the CRF as a monocular 95% of the time. For the little price difference definitely go Leica.
I have had zero problems with the 2000 but I have only had it six months. My CRF 1200 is almost ten years old, has ranged thousands of reading and still works perfect. If you have a problem send it back to Leica but I have never talked to anyone that had to do that. Must be some failures but sure isn't common.
Realistically 1600 or 2000 makes no difference, I am not shooting game past 6 or 700 yards anyhow, most of the time we stalk well within 400 yards because to me the stalk is a big part of hunting. Even the 1200 will range Springbock (A very small animal) at 900 yards on a real sunny day. Only advantage to the 2000 is it has the ballistics function, which except for the angle reading I never actually use. I have a drop card on the stock of my gun, all I need to know is the actual range.