Yeah I've looked at the camera size comparisons and so forth. With a limited zoom I feel like I'd kinda rather have a nice fast prime on there instead for the benefits there in low light and dof. I really don't use the zoom on my S95 a lot since it reduces the aperture so much. Then again, maybe I would use the zoom more if I was using a G1x-sized sensor so that I could crank the ISO a bit and retain a usable shutter speed despite the smaller aperture. Suppose so. X100 seems more attractive to me though, if quirkier.
X100 might be your best bet, any aps-c camera/m43 mirroless camera with a prime just looks big in comparison:

I still prefer the X-Pro 1 XD
Sony also has a 16mm f2.8 for the Nex systems which is a pancake lens.