I currently have a razer deathadder that I got at the end of 2010 and am looking to replace it this xmas as the thumb button has broken. I'm basically stuck between simply getting the newer deathadder (as I'm perfectly happy with this one) or trying something new; I really like the look of the roccat kone pure but I see that some people are complaining that it doesn't have an optical sensor. Basically if anyone has the Roccat Kone Pure could you let me know what you think of it, and equally what you think of the newest deathadder.

I will be using the mouse predominantly for fps gaming (CSGO).

Also do either of them have any 'native acceleration' because acceleration (positive or negative) that you can't disable would annoy me no end.

ive had a kone and didn't really like using it - cant really pin point what was wrong, i just wasn't comfortable using it so i reverted back to my da. if you're happy with what you have why change?