we enjoy the Mama Melrose Fantasmic package...good food (but slow service, don't know why...seems like the kitchen is just not on the ball there.) We did it in 9/2008 and 5/2009.
If you're on the dining plan, it's one table service credit per person.
We have also had Hollywood & Vine, and liked it just fine, but a lot of people give it a thumbs down, so may have gone down hill since we were there (we did H&V Fantasmic package in 5/2008 so been more than a year.)
Brown Derby is expensive ("signature dining") so it's going to run you 2 Table SErvice per person...I think the cash price per adult is clost to $50 for the Fantasmic package. We've never done Brown Derby so can't help you there on recommendation.