i kinda like the first one.. not sure what it is, but i kinda like it :P

as far as the "dreamy" effects... i think the 3rd looks most like what you're going for... but instead of a hazy/dreamy effect you have more of a clouded effect..
(haven't tested this out) but maybe try and put ripples or some sort of filter in there to give it that dreamy/wavy effect overtop of the render and bg to get a better effect...