Do not buy Razer. I had a keyboard, quite expensive one and it was like a wooden block, except when it came to durability. I have no experience out of Razer mouses, but i can surely imagine... I have this, used to have Logitech G5 and mx518, was little worried how it'd fit in my hand, but it just does after couple of hours: http://www.roccat.org/Products/Gaming-Mice/ROCCAT-Kone-/ New versions already out there and i can tell from my own experience, it's a great brand with quality/quite low price.