rules are there to be broken... the pic sounds fine to me. 

here is a pic from my favourites galllry similar to what you described (as far as i can tell)... it breaks the compositional rule you were talking about, but because of it it makes a fantastic image:

http://www.renderosity.com/mod/gallery/index.php?image_id=1313288

Post it - if you like the pic it doesnt matter what others might say ;)

"In every colour, there's the light.
In every stone sleeps a crystal.
Remember the Shaman, when he used to say:
Man is the dream of the Dolphin"

Rich Meadows Photography