it doesn't really matter....u know why?
it's the same as the rogue talents or the warrior rage based ones
even if the weapon/gun has a low rate/speed of attacking, the speed is given by the abilities:
concusive shot, arcane shot, etc [hunter]
sinister strike, eviscerate, etc [rogue]
rend, mocking blow, etc [warrior]
so leave the gun the same but try to find/modify some cool tbc trinkets
especially the ones with "haste" values...
cheerz
K4LiGuL4