Would putting the two C-50s up front and using the classics as surrounds cause any balance issues? I don't see why it would, but figured I should check with the experts.
It would be fine as long as you use a third C-50 as your center channel. The C-50s are pretty small speakers so it should be quite doable to fit it above or below your TV. Your fronts should all match. Also, your AVR should be able to set different crossovers for different speakers since the C-50s can be crossed over lower (at 80 or 90Hz) than the Take Classics (which need to be crossed over to the sub at 110 or 120 Hz).