I personally favor 15x binos. I have used 7x LRF’s for a long time, such having a 10x bino simply isn’t a huge step up. Each time I have bought a pair of 10x or 12x binos, I have ended up leaving them behind and eventually selling them. 15’s bring the right view which is a significant step up over what I can see with my LRF. So if I feel I need to carry anything more than my LRF, I step all the way to the 15’s.
I lucked into a set of 15x56mm Swarovski SLC’s a couple years ago, and absolutely love them. I have used Vortex Vultures as well, at a much friendlier price point, but these Swaro’s can’t be beat. I mount them on a tripod for precision rifle matches, where I can look through them for 8+ hours per day without strain or headaches. I also haul them in a chest harness while packing up mountain. The size and weight is naturally more than a smaller 10x set, but in a proper harness, it’s still a very comfortable size and weight for me.