I like the style so far. The reason you've got choppy edges is you stretched the graphic. Try this, right click on the main graphic and choose view image, it'll shrink in down to it's original size and all the stressed edges are gone. If it's possible, you can leave it at it's original size, I'm viewing at 1600x1200 and it looks plenty big enough.

Nice start,
 I fought with black or white BG, finally went with white, yet my image player looks better in black. O-well

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Ockham's razor- It's that simple