Mike start by reading this link. It is a bit dated and new info has changed some of it but the basics are right. HBG as hybrids have pluses and minus - nothing new to that however. The negative is the offspring which the HSB and the adult HBG should control. There are 2 pluses and one is very good for your plan. One is they have a fast initial growth rate (big mouth) but the biggest plus is there aggressive nature. They are easy to catch (great for kids) and they eat pellets well.

http://msucares.com/wildfish/fisheries/farmpond/building/stocking4.html

We have enough info here on hybrid sunfish to fill a book but start with that link and we can go from there. In the link don't worry about the statement to not stock with other fish it is no longer followed.