hi

ms 200
http://www.newegg.com/Product/Product.aspx?Item=N82E16826105447

comfort 3000
http://www.newegg.com/Product/Product.aspx?Item=N82E16826105189

basic optical
http://www.newegg.com/Product/Product.aspx?Item=N82E16826105091


the first one looks good, its 10,7cm long. good for RTS i guess if the sensor is responsive enough.
comfort 300 seems pretty big. and basic optical too narrow?

waht do you think? You tried those?