Currently I have the Leica Duovid 10+15x50, and have picked up a Vortex Razor 65mm spotter since the last Coues hunt. 
Has anyone dumped their 10x, 15x binos in favor of just the Swaro 12x coupled with a spotter?  What are your preferences, pluses, and minuses?  Is losing the 15x a major consideration?  I had originally switched years ago to the Duovid for weight consideration ave carrying both 10x and 15x binos.