I believe if you choose traditional you are stuck with it. You need to have Personal Choice for the alternative dining. (I could be wrong on the Steakhouse someone else may know for sure).
If I was you I'd go with Personal choice. We have good luck with it and end up finding waiters we really like and make reservations at their table every night at the in between time of 7 - instead of 6 or 8:15.. You'd then have the flexibility to go to the steak house too when you'd like.
The Horizon Court is open to all any time.