I'm in the market for a new mouse to replace a 1998 Logitech rollerball rodent! I'm really split between these two mice. I love the Kone's colour strips, weight system and tilt scrolling, but I've heard that the Castor is the mouse to get for pure performance and accuracy. Apparently it's better and more nimble than the Naos 7000, while still being ergonomic. Has anyone tried both? I don't want to get the 'best' hype mouse, like the g502 was last year, and would prefer something more comfortable while still high up on the accuracy and sensor ratings.