I find if the fish grows to big there's often a similar fish that's smaller, fish such as: orangespotted sunfish, bluespotted sunfish can replace bluegill in a smaller tankI understand your devotion to the fish, I'm there brother, but size should a be a product of the devotion not the goal of it.
Regardless my main gripe is how people who start threads asking for help and advice are met with this almost condescending attitude of why they cannot keep said fish. I understand that fish aren't disposable and shouldn't be considered such but the attitude of trying to tell people that fish are so difficult that people with small aquariums are somehow less than the rest of us is quite self destructive to the hobby. If people had been that way when i was starting out I probably never would have started keeping natives... or even fish for that matter since natives preceded tropicals by a large amount...