Looks good J!
Try this trick:
Duplicate Layer, Change new layer to vivid color, go to select>color range, fuzziness 100, click on the dark areas, select>feather 100, copy, paste, change layer #2 back to normal, change layer #3 to screen.
It takes a while to play with it, but it will lighten your dark areas without blowing out your whites.
You can also make your bright areas darker doing the same thing, just select the light areas and make the new layer multiply.