I have the DA Ti direct thread. It moves between 5 barrels. Its a great can with no poi shift at all. I would seriously think about getting one with a QD, instead of direct if your going to put it on an ar tho. A 30 cal can will give you more choices down the road.
This also leaves room for a 22lr can. I have the mask also, its just about the same as the tbac 22-takedown.
Now, not to sound like a DA fanboy, I have 2 tbac ultra 9's 6.5 in jail. I bought them because I shoot mostly 6&6.5 cals, and I wanted maximum suppression....well and everyone is a fanboy on this site.
Since this is your first one, there are some things to think about.....
POI shift matters, don't go cheap. Both DA and TBAC are top notch.
If your going to move it around guns, especially a semi, I would go QD over direct.
Buy a 22LR also while you are at it. Its going to be a year before you get to use them anyway. I would def go DA or TABC for a 22LR. This is the fun can !!! Most guys regret not getting one with a first time diving into NFA.
This will not be your last purchase, it is the beginning of more to come.
If money is a concern, realize you can get 2 DA's for the price of 1 TBAC.
I have 4 cans currently + 2 in jail and shoot quite a bit. To keep my round count down, I bought additional suppressors. You will not believe how much more enjoyable shooting is with one all the time. There are lots of good ones out there, but I can highly recommend Dead Air.