this is a nice example of turning a simple composition into something more interesting. i like the 2nd and 3rd pics because of the higher contrast. in hindight, it might have been better to meter for the highlights while taking the photo and let the shadows be underexposed. this might have enhaced the detail in the blown parts of the hand.
i think the darkening also works because it removes the distracting chair handle from the photo. could you try giving a neutral grey tone to the background in the 3rd picture? the colour right now is almost competing with the colour of the hand.
if you are treating this as a series, i would not put the b&w photo between the 2 coloured ones.