In a nutshell, I need to replace two of our PA speakers. The current speakers have 200w continuous and 800w peak rating listed on the back. They are Behringer 12". The one's I am considering replacing with are the Peavey PBK 15" that are listed at 560w program power. So does program power rating of the Peavey relate to the continuous rating of the Behringer or the peak rating or neither? I want to get something at least as capable or better than what we have now. Any other suggestions welcome but the budget isn't huge. Thanks!!