If by "reasonable" you mean relatively inexpensive, I wouldn't go with Artist Point. It's very good, but it is also quite pricey.
My recommendations for good value-for-money would be either Kona Cafe at the Poly, or Narcoosee's at the GF. Service is quick at both of them, too, which means that you will spend less time at dinner and therefore pay for fewer hours at the club. For either of these, I would go with the Neverland Club at the Poly. It's the best club in terms of theming, and they offer a kids' dinner buffet as part of the price. The club at GF is not themed.
Another possibility are the restaurants around the Boardwalk area, and also those at the S/D. The Harbor Club is walking distance to all of them. Go out to the Menu section on the main DIS page or at allearsnet.com; that will give you an idea of what is offered and in what price range.