I really like the first one, except from the text - one thing I think you are doing is using text to fill up space - only use text if you really feel it is needed to improve the piece. That being said, it is a nice and colorful piece, I like how the 3D shapes lead you in to the render. The second one could be good, but the text and where you have erased by the girl's breast detract from the rest of the piece. The background on the other hand is great, it's chaotic but at the same time works really well :)