Your composition is almost flawless, the tree on the left is slightly distracting but that's about it. One of the flares, the one coming down on the boat, is a bit distracting.
I think your photograph has great potential, but there is one thing that just devastates this photograph for me. That typical, oversaturated, wonderfully terrible HDR. A huge cutback on the saturation would do this photograph a lot of good, and perhaps a manual blending instead of a Photomatix-automatic blending, which it looks like, sorry if I'm wrong. Looking at your other photographs, though, indicates you don't do way too many HDRs like this, I must say your other photographs look way better!
I love the line of sun ray that crosses over the boat and the others that look like they're setting the water on fire!
The sun is the focus, then we follow the ray to the boat and follow the line of the boat to the left of the photo; A second look makes me see the sky, the still water to the right of the picture and finally the green line of trees that head back to the sun. Really, really nice