It doesn't sound like you have tried the Curio 7x21 yet, but I think when you do, you will be pleasantly surprised. The Curio's have equally good optics as the CLs if not better, plus you will have a larger FOV, they will be brighter, you will have less shake, and you will have better DOF. Even though you say you can hold the CLs steady 10x will have much more shake than 7x, so what you gain in additional detail because of the higher magnification you lose in resolution because you are shaking. Smaller compact binoculars like the Curio and CLs are harder to hold steady than larger full size binoculars.
It sounds like, to me, you would be better off with the Curio because you are doing a lot of hiking, and you would like to use the binoculars for exploring cities and going to sporting events. The Curio would be ideal for those kinds of things and more easily carried in your pocket. If you're sold on a 10x25 binocular, and you are ok with carrying that size of binocular, you might consider an IS binocular like the new Nikon 10x25 S which is much improved optically and mechanically over the original version and eliminates the shaking at 10x and actually increases resolution by as much as 30% because you are steady and makes observing things for a longer period of time much easier and more relaxing. Otherwise, I would get the Curio.
Nikon STABILIZED 10x25 S binoculars are compact and offer a blur-free view that's easier on the eyes and fits in a pocket.
www.nikonusa.com