+1 on lightroom 4, it really is a quick way of turning around images like this. I had a crack at it, maybe took me 30 seconds.
As for exposure, it was bang on for something to play with in lightroom. If i was shooting straight out of the camera, I might look at a different colour space. Attached is my first crack at it.
I might have gone a little overboard on the vibrancy slider, but literally took me about 20 clicks to do this.
I applied a little cropping, lens correction and a touch on curves, vibrancy and contrast