I could easily be wrong, but I don't think it's possible to get one any better, is it? Even if you run the game through an emulator at your chosen resolution, the video is still limited in size. Any attempt to make it bigger doesn't scale well, and it becomes rather unpleasent quickly. At least, that's been my attempts at it. I've been working on modeling a few things and wanted to get some larger images to work with, without losing the detail and haven't been able to pull it off.