Have you read the Crappie pond threads? See the threads linked here.
http://www.pondboss.com/cgi-bin/ubbcgi/ultimatebb.cgi?ubb=get_topic;f=5;t=000461

I would suggest that they are a good place to start as they cover hybrid crappie. There are peer reviewed studies on hybrid crappie and they don't show a super fish but ones that are mid -range of their parentals but with lower reproduction (fecundity) rates.