That looks like an awfully good deal. I would be wary of the Miflex HP hose -- they have quite a reputation for failure. I wouldn't personally choose that backup regulator, but it will probably do fine for basic recreational diving. You can put any regulator on a necklace, so long as it has a mouthpiece. Getting the camband weight pouches with the package is a nice touch.
You won't need the padding, either on the plate or on the strap, but it won't hurt anything. But do not assume that difference pieces of backplate setups from different manufacturers are compatible -- it's all in how they affix to the plate, and different plates have different patterns of slots and holes. Some things just don't work together.
You won't need the padding, either on the plate or on the strap, but it won't hurt anything. But do not assume that difference pieces of backplate setups from different manufacturers are compatible -- it's all in how they affix to the plate, and different plates have different patterns of slots and holes. Some things just don't work together.