jesus christ this is a first world thread.
The general consensus is that light mice + control pad with medium/low sens is optimal for tac-fps games.
*Of course this varies person to person
I would recommend lowering your sens if you go for a lighter mouse, as you will have more control. Also consider a slower pad if you don't have the Raiden already.
As for mouse, I definitely recommend getting something lighter if you can. The less weight you have to carry, the more control you have, naturally. Wireless is just icing on the cake