I played with the MP5K most of the time. Picked up the Super V just recently, because it has a better ROF. And as I always play them silenced, a high ROF makes it easier to put someone down quickly.
The Super V is basicly much better than the MP5K, too, because it has such a low recoil. But then I feel a little cheap using it and switch back to the MP5K. Or if I'm facing not so good players, I go pistol only.
Weird my bro prefers the UMP.
The
UMP45 silenced is by far the best weapon in MW2. No recoil on consoles and very easy to control on PC paired with a ridiculously high damage.