If I had to choose one of these, it's going to be #4. Although, #3 is really close. But overall, these could use some work.
Choppy around the CD. Crappy JPEG quality. Background looks like a Screencap from those Windows Media Player image effects. Text is bland.
Image looks like it was from the 80s-90s movie. BG Image is nice, but low-quality. The red veins text is really distracting. Why is it on the Sapphire anyways? The Sapphire text looks neat, though. Again, JPEG ruins images.
White text blends too much, making it hard to read. Although the whole text is really nice, the background is boring. Hey, at least you used PNG this one. If the background was a little bit more interesting, I would choose this one.
Even in JPEG format, the image still looks clear and nice.
You know, if it wasn't for the JPEG format, and the text with the crappy white BG, I would actually choose this one.