The RX100 has an f1.8 aperture.
I had a Canon s95, and I liked everything about it except for the slightly mushy build quality and some softness at full zoom. I bought a Panasonic GX1 with a 14mm lens for $250. It has a better sensor, and great build quality, looks cool and feels great, but I am still learning to shoot with a 14mm prime lens and need to get a 14-42mm for a little more utility. It also is not quite pocket sized, so my wife complains more about me bringing the camera, hence more missed shots.