Hard to say,

I don't like the BIG logos of Sunfly and Mr Entertainer, that take up more then ¾ of the area. Also if it can't be done right (the excuse of limited resolution and colour space), then you might as well not put it.

and that mess at the bottom of SBI is just dumb (though the logo at the top looks good and is the right size)

Sing to the world is just boring

and

The music factory is both boring and a bad choice of colours

I think Zoom looks half decent (I guess a blue box makes all the difference?)

but I would pick the Soundchoice as the best even though I agree with Daniel and the TNR font should be changed as well as the colour (that purple is a bad choice), if I was touching it up a bit I would also shrink the "In the style of" by a point or two.