We stocked F1 intergrades and were consistently disappointed with growth rates as seen in fishery surveys. Not sure what the problem was� We also have surveyed lakes where the infamous tiger bass (from other sources) had been stocked, and we were disappointed with those as well. Actually, I was downright bored with my largemouth bass program until I was able to acquire these Camelot Bell brood stock. Now I feel that I have my groove back.
With pure genetics in a new pond you have something you can count on to breed true year after year. You can start your own breeding program in a brood pond, and you have something that has true bartering value with your network of pond boss buddies. Sell or trade your culled overcrowded bass. But if you mix up the genetics or stock hybrids, then you won't know what you have in a few years.
If you have a new body of water to work with in southern waters, I don't see why you would want anything other than pure Florida genetics.