The Axxis Metalmasters are wonderful pads. They are however a fully metal pad, which can, compared to non-metallic take a little longer to warm up, and be a bit more harsh on the rotors. The difference may or may not be noticeable, depending on your braking style, and usage.
Mintex Red Box are a very similar pad, with slightly less metal, making for a pad that heats up a bit quicker. They also produce far less dust than most stock pads.