I got Genius Navigator 535 Laser Gaming Mouse. Its 2000dpi, has the usual left button, right button , scroll wheel doubling up as middle button, 2 buttons on each side of the mouse. thats totally 7 buttons. Also below the scroll wheel , there are 3 buttons for 2000dpi, 1600dpi and 800dpi instant sensitivity switching. There is a not so obvious button under genius logo for changing gaming profile. This button allows you to select from 5 different mouse configurations stored on the mouse itself. Mouse configurations can be set by the agama software provided. The mouse can be used with all its features without drivers. The agama sofware (driver) is needed only for setting the profiles and once set it you can take it to LAN parties without the driver CD.
I bought it in Hyderabad for Rs 2360 inclusive of taxes with 3 years warranty from authorised dealer.
Techtree review
Only bad thing is that its lift off distance is high and needs getting used to.