I feel like I am beating a dead horse but try the Sig Sauer Zulu 6 HDX 10x30 image stabilized binoculars. They are lighter and smaller than the Canon 10x30 IS III. I think the optics are a little better with less CA, they are brighter and have better contrast.
The newer HDX model is supposed to have a little better ED glass, they are IPX7 waterproof instead of IPX4, and they have a feature I really like which makes the additional cost over the older model worth it. They have a two mode IS system.
One mode is for scanning or when you are panning and searching for something, and the other mode is for targeting or when you have found your target, and you just want to observe it closely. Even the scan mode is slightly better than the Canon, but the target mode takes the IS to a whole different level.
When you put them in target mode, the view is rock solid, I mean ROCK SOLID like a tripod with no artifacts present. It is really nice when you have found the desired object you want to observe, and you can just enjoy watching it as if you were using a tripod.
Another nice feature of all the Sig's is you don't have to hold down a button to keep the IS engaged, like you do in some of the Canon's like the 10x30 IS II or Canon 12x36 IS III. The smaller Canons like the 8x20 IS and 10x20 IS do stay on. With the Sigs you turn a switch and the IS stays on for 5 minutes and then shuts off. By turning the switch again, you can toggle back and forth between target mode and scan mode. The switch defaults to scan mode in the beginning.
I have tried all the Canon's that are being discussed, and they are all very good. The Canon 8x20 IS and 10x20 IS are both very good small IS binoculars with excellent optics, but they are not going to be the best choice in low light. I prefer the Canon 10x30 IS III over them optically if you don't mind carrying a slightly larger, heavier binocular because it has a larger AFOV and with its bigger EP it is going to be a little brighter, especially in low light making it a better all around binocular. Many of the Canons, especially the Canon 10x30 IS II also have serious issues with the armor melting when exposed to Deet so that is one thing to be cautious of.
