I found the bore axis of the Nano to be very high in relation to the grip.
Never shot one, but looked like it'd be pretty "flippy."
I liked the Kimber Solo, but found the trigger to be mushy.... I also heard it was not terribly reliable.
I have not found anything as nice as my EMP ...... the sR9c is the closest. Both are larger than what you are looking for.
TheGolden Rule of Tool Use: "If you don't know what you are doing, DON'T."