I agree, I would brighten it just a tad there at the horizon so that you could see the tow boat, I had to really look for it.
But very very neat picture, love it, just fantastic! TFS!
I much perfer the 1st one regarding composition. If you do any lightening, you need to mask and do it only on the water and only a very slight amount. I think it looks darn good as it is though.