I started in March, (1 acre pond), with 1000 cnbg, 200 redears, and 15 lbs of fatheads. Then, in June I stocked 120 F1 Tiger's from American Sportfish. All are thriving and the bass have already grown from 2" in June to 7" now! Growth will eventually slow down, I'm sure, but it's been phenomenal so far. They are also very aggressive and already will hit and tear up a small swim bait. I don't see a downside to adding them at all. Best of both worlds in my opinion. Now, as for the HSB, I'm not sure if you want two apex predators added at the same time like that, but I'll leave that to those here that are more knowledgeable than I on that subject, (*which is most! lol). I just wanted to share my personal experience and say that so far, I am very happy with my choice of F1's.
