What is your favorite 9mm pistol suppressor host and why?

I've seen the M&P 9mm with Threaded Barrel for around $500 and the Sig P2022 9mm with threaded barrel for around $500.  Who has these and what are the positives and negatives when it comes to suppressing them.  I'm leaning toward the Sig at the moment.

HK USP 9MMSD (9mm tactical).  I like the recoil impulse, height of the sights, light trigger with minimal take up/over travel.  Accuracy is great and the added bonus of matching the profile of the Osprey is great.

After running sig, beretta, Hk, and glock I have no found a host that is quieter than my g19 with tirant 9

Glock.  33rnds.  No other reason for a plastic gun IMO.  Other than that, 1911 9mm.

Nagant revolver

...because it's not plastic!

Good call.

I really like the HK p-30 9mm.  If it wouldn't cost me $1,100 + for the gun and a threaded barrel.

Glock 17 w/ AAC tirant 9 and fiocchi 158gr.

Another HK USP 9SD fanboy here. With the Jet funnel, you have 18+1 capacity. The trigger is decent out of the box, but installing a match trigger or changing the decocker/safety configuration is no problem . It already has a threaded barrel and tall sights. The main reason its my preferred host is because it is super accurate and suppresses very well.

I currently have a Beretta 92, a Glock 19, a 17, an XD Tactical, a CZ P07, an M&P 9, an HK USP 9, a 229 Dark Elite, and as of yesterday, an SP2022.  All of these have threaded barrels and I have shot 147 grain PPU ammo out of them, except for the Sig 2022, which I havent shot yet.  

The very best bang for the buck was the CZ.   From the factory, the barrel threads were too long for my MultiMount piston, so I trimmed them down .200 in a lathe.   If the barrel threads were correct from the factory, I would say that it is superior to the HK.   Otherwise, Id have to rate it as equal.   I think the HK, the CZ and the XD suppress the best for me, with the Beretta being just as good.   The only problem I have with the Beretta is that its just a plain 92 FS and therefore I cant get tall sights for it.   I really prefer tall sights.    

If I could have only one of the above guns, it would be between the HK and CZ.   I really think the CZ is the better gun, despite the price.   The goofy barrel threads are a bonehead move that CZ should have known better than.   Therefore, the HK probably would get the nod.   If you have access to a lathe or the patience to send the barrel off, get the CZ.  

Oh, BTW, the Beretta, the 19, the CZ, the M&P, the HK, the 229 and the 2022 are all factory threaded barrels.  the XD and 17 are aftermarket barrels, EFK and Lonewolf, respectively.

Hmmm.  I've heard a few good things about the CZ P07.

I use my G17 as a host, however I just bought a 226 stainless elite to use next.

Let me know how you like the 226.  

I guess I'm not as interested in striker fire pistols any more.  Really want something with an exposed hammer and a nice crisp single action pull.

Nothing against striker fired,  They are very reliable.  

For my Octane I use a G19 and a p226SE. The 226SE is pretty hefty loaded and suppressed and virtually no recoil/muzzle flip. The g19 all geared up is extremely light and handy. I like both pistols but the g19 wins with me for light weight.

I bought the 226STE because it was HEAVY. I wanted the weight. I figured it would be a nice thing to try. I want to find a used 226 ST non elite right now

I like my xd.

HK USP9SD