I'm pretty sure the deferred wing gambit is better. Keres wrote a book on the wing gambit that may be worth looking into though. a3 planning b4 is interesting; I believe there is a book on it.
If you really want to nail sicilian players, buy experts versus the sicilian and be a man in the open sicilian
Morra is rather boring though there are a lot of traps. A LOT. There's a reason the mainline starts like 3 or 4 moves in. A lot of natural moves lose.
Grand Prix is also fun, though best deferred because of the tal gambit.
I personally play the alapin though.