1216audio

I am thinking about the 3bx for reel to reel tape only, for playing back of factory recorded tapes, the sound from good tapes is incredible but the hiss is a pest. Is a 3bx good for hiss reduction? I know there are hiss reducers out there but I thought a 3BX for a little dynamics as well..... Should I stick with series III. Should I be looking at a 4bx or the holy grail 5bx??? I had ( actually still do stored away) a DBX 5 CD player, it had the features a DS series offers built in, I never used the features as they did nothing for me, maybe I was using them wrong I dont know........ looking for some opinions from folks who have used these units.....Thanks