I think we are going to do both of these and they fit our schedule nicely but best fits if one is a breakfast and one is a dinner...which should we do of each!?!?
None of the food at CM is good...IMHO. So, I would choose breakfast as it's cheaper.
We've eaten at Crystal Palace numerous times - just ate there for dinner last week, and for us, lunch is more value as it's cheaper. A lot of the same food for dinner, with the addition of a bit of seafood (which we can't eat), so sincei it's cheaper and pretty close to the same thing, we prefer lunch.