Depends when you are going as isn't Walts closed shortly. Another poster on here wanted to book there and has been told it is closed, but I don't know the dates - sorry - or it could be it is closed on the days she is there as doesn't it close 1 or 2 days per week? Both Walts and BL are nice but imo (I've eaten a few times at both), but I don't think they are 'premium' restaurants in line with Inventions or Auberge, (I know Walts has been recategorised as a premium now). I think those two are probably the best of the other options - but bear in mind, opening hours depend on park closing times for both of them. Often they stop taking bookings an hour or two before the park closes so it might be best to call the booking line to ask the times and openings etc before you get your heart set on one or the other.