MEK said:to the DIS!
Are you going late enough in August that you might qualify for the free dining promotion? (Usually starts the end of August).
Personally, I think the DxDP is a nice upgrade because it gives you the opportunity to eat at more signature restaurants and see some of the various Deluxe resorts while doing so. So, I would probably pick the DxDP simply because you can tray a greater variety of restaurants. But staying club level doesn't sound so bad either.
Good luck with your decision.