Nikon Monarch 10x42s... I tried both the 8xs and the 10xs and didn't feel I was giving up anything that Jeff alluded to above (since I had the same concerns) and decided to take the little bit of extra magnification as a bonus.
I was "thinking" you had to hold steadier to keep a clear sight picture when you went up in magnification. I could be wrong. That's why (along witht he size factor) I went with the 8x's.