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so don't judge the size of a mouse by its measurement, it can only be the reference.
for the X5, the micro switch is panasonic and that is pretty soft.
the pad is not level because some of the screw is too tight and some are not. that is a common problem with microsoft mouse.
you can...
Philip's sensor work well on hard surface.
also it has good performance on soft surface but a thick soft pad will lead to some kind of Z axis problem typical in this sensor.
Func series are good. cheap and long-lasting.
if your palm is wide I just can recommend sindewinder X5
this mouse is high and large. much bigger than ikari or G400/MX518/G500 series.
it will fill your palm well with its huge ass
I strongly recommend the Imerator....
4G sensor is the best performance sensor now(PLN2033)
although RAT7's PLN2032 is good too, the shape is not as comfortable and not all the people can handle the mouse
Ikari laser is picky...that is right
So you can try Ikari optical and the sensor is mature. 1600dpi is enough.
The imperator.....I must say this mouse is too small for a 24cm hand
if you want the imperator I just recommend Manba or DA
I am wondering if you measure your hand correctly...
24cm is a big size
1:Sidewinder X8 or maybe X5,I remember X5 is even larger (X5 is the largest mouse I ever used)
2:Manba/Deathadder
3:Sensei/XAI
4:Ikari optical or laser or lady suite:-), Ikari is pretty comfortable for big hands and it is the most comfortable mouse I have ever use. But...