You don't have to choose. full stop. When you reapply for your US passport, they don't ask for a copy of your UK passport; they ask for a copy of your naturalization form. That's the key act.
Look into the mirror and say five times, Candyman, Candyman, Candyman, er, sorry: I am a British citizen, I am a British citizen.
That's the fact, union jack, so don't get worried, get busy harassing the IND, who deserves it for all the s*** they put non-whites through.