buy a Razer Deathadder (best mouse existing imo), i once had a mouse with 2000dpi sensor aiming was much more easier and it always responded well even when i moved my and very fast. then after time it broke... :(
now i use a cheap logitech RX250 with 1000dpi sensor, still much better than microsoft basic ones (with 400dpi sensor) but the difference is much against the 2000dpi one...
now i use a cheap logitech RX250 with 1000dpi sensor, still much better than microsoft basic ones (with 400dpi sensor) but the difference is much against the 2000dpi one...