Nicely done Jake, particularly the blending.
I tried a similar exercise with the Catherine Hill Bay jetty south of Newcastle and quickly learnt not to use two different lens.
I've found a couple of useful tools in CS6 that can make a dramatic difference to your PP, the Gamma slider under Image>Adjustments>Exposure and the Dehaze slider in Camera Raw
fx (Effects).
PP is very subjective and unless someone is paying you for the shot the only person that you have satisfy with the final result is yourself.
Keep up the good work.
PS: The D600/D610 is thought to be one of the best cameras for this type of photography. I'm on the lookout for one to have modded with an H-Alpha filter