I like #3 the best, #2 is a bit too big IMO. The others are out of question as far as I'm concerned, without the dark background the logo blends in with the background too much, and I dislike the zoom blur on the last ones too.
However, I would like you to move the logo with the entire dark box background up from the middle a bit, and under it add another, smaller dark box background with the text: "Loading..." (preferably with a similar font as the logo has, but no idea how to accomplish that, it was iirc drawn by hand)
And you do know that the image dimensions have to be a power of two? So for instance instead of your current 1600x1200 you have to make it 1024x1024. The sides could just be filled with black, so make sure there's only black pixels on the sides.
ps. PM me again when you're done, only way to make sure I see that
ps. Learn GIMP, it's much more open source friendly than photoshop