Sorry, but I just voted so that I could see the answers. I havn't even been on any of the lines so I picked the one that I've heard has great food.
Okay. I won't be mad because I didn't see it at first either, but there is a way to see them without voting - a link that says "go directly to the answers" just below the poll. Once the answers are shown the link to goes away.
In any case, I can tell you they all have very good food. I would say that of them all, my one disappointment for a lux line was Crystal. We had some tough steak (more than once) and some food served cold for no reason.
Oceania has excellent food, a choice for 4 restaurants, all different, on a ship that only holds 700, and no additional charges.
Radisson has wonderful food. Haven't tried Seabourn or Cunard personally.