If you are looking at wainrights just remember that it isn't a make of food, it's just a brand name used by PAH. The different types of food - kibble, pouches and wet trays seem to be produced by lots of different manufacturers and consequently the quality varies. I would guess they are all better than Pedigree Chum though!
I feed Archie the wet trays (no kibble). It is excellent and he loves it. I can't recommend it highly enough if you are considering a change of the wet part of his food.