the cataclysm doesnt seem to be so good
if you want a steelseries, get the xai or that one that has a k in the name
i've been looking around between the razer naga and steelseries xai for over a month, and i decided to go for the xai, the razer seems to be rather small and i want everything of the same brand (no comment) and i really hate razer keyboards, so the mouse of choice for me was the xai.
not to mention both are excellent mouses, tho itd be awesome if you could find a store near where you can try them