1. When the music first comes in during Ben's Hut scene, it's a bit too loud. Turn it down and it'll be perfect.
2. The transition to the Imperial March is a bit jarring. Perhaps instead of rolling right into the melody, you could use the first few seconds of the Imperial March track which is mainly percussion and the underlying bass parts.
3. I think you should cut down on the amount of SD's and TIE Fighters in the space shot. I don't think we should see the TRUE might of the Empire until ESB.
4. The planet used in the shot is beautiful, but it might just be a bit too bright. This is way the idea of maybe using Mustafar would be something worthy of consideration.
Other than that, it's BEAUTIFUL!