The only Leica that I've tried was a 1000 and that was only once. It's a nice piece of hardware and the smaller size is preferred but it costs a lot more than the Newcon. I can't speak about the Bushnell. I've owned it for about 4-5 months now and in that time have had limited use with it, haven't ranged any animals yet. It easily can range houses off my balcony at 400+ The clarity is ok and I have not yet tried it at dusk/dawn to see how it preforms but in all honesty I didn't expect super performance optically for the price that they sell at.
My first choice was the Newcon 2200 but when I found this one on the EE I nabbed it as it was going for a great price. Overall I'm happy with it but like I said, I have limited use with it so far. Sorry I couldn't be more help.