I've only eaten at 4, and if Le Cellier is counted (it wasn't when we ate there) it would be my favorite. The other three Jikos, Brown Derby, and CRT were all very good, and I wouldn't hesitate to return to any of them.
On our next trip, I'm hoping to try Artist Point and maybe California Grill. It depends on where we end up staying, and the overall budget for the trip.