This kind of program needs a lot of screen real estate, so I recommend the main window to be at least 1200x800. Probably it's best to just maximize the window (which is the default behavior.) If your screen has a smaller resolution, changing the fonts should help you cram more information into the little space you have.

I made the decision to use ID3V2.3.0 instead of the newer ID3V2.4.0 because the differences are rather small and I didn't like what I saw in some 2.4.0 files (invalid fields that some tools create and others expect to be invalid.)