I've got the Roccat Kone, nothing negativ to say (haptics, quality, dpi, button response, etc).
The weights (5-20g) and the TCU (Tracking Control Unit) are also very nice features.
I like the haptic alot, i'm not a Razerfan just by my hands anatomy.
If you can get your hand on it somewhere, test it
... ah yeah i forgot the ultra-übergamer lightning features fTW!"!!!11
*imho*
comparing the gaming mices is mainly a question of the feeling when you play it, eh..