I agree totally with Paff, 35-40mm poppers are definately the preferred choice for me when im after bream and whiting, i never use anything over 50mm and only use the 50's when its very windy. Im not saying the 75's and bigger dont work, but i dont have any luck with poppers over the 50mm size.
I find with smaller sizes it takes longer for the whiting to go off the bite, and even when they do its just a matter of changing colours or brand (for a slightly different rattle) and you will continue to get them.
The Px45's, Towadi's and other "walk the dog" type surface lures are great for when the water is dead calm, or when the fish are shy, especially for bream, flathead will just about hit anything, but if im specifically targetting flatties on the surface i use 50-60mm poppers retreived very slowly.
Ive only just got onto the blade lures, but ive been using the Ecogear Vx35's with some success, and also Atomic hardz, crank and minnow with reasonable success.
The list of SP's is endless, but probably the standouts for me are the Squidgie wrigglers in bloodworm, Or Squidgie lobby.
All the lures i use in the estuaries are natural colours, i dont usually buy any of the standout/bright colours, i just dont have confidence in them so i stick with what i know works well.