If I were you I'd suppress the one I want or need to first, the one I use the most, then get something else later for the other. Why?
Because if you're 99.99% like the rest of us, that's what's gonna happen anyway.
Elite Iron would be my choice if you were gonna go with just one. Or even two --Elite Iron is able to keep costs down by not using gimmicks, advertising or a large workforce to enable that. And he doesn't price gouge, he's honest and tells it like it is. Like TBAC, he'll also recommend other companies if he feels they can do a better job than he can. Got my .50 and .338 brakes and cans from Elite. Like TBAC, Elite uses a thread over brake so the cans go on straight and solid. He makes a phenomenal 6.5 can too, he told me he'd stack it up against any other 6.5 can out there (at that time) and if you know him, then you know he doesn't make statements like that lightly.
For true QD, I like KAC QDC and Sico Saker. QDC is probably the best "all around" can made. It actually has no real cons I can think of. True QD twist on, twist off, fairly light, locks up TDC, flash hider mounts work, brake mount is probably one of the best made, it REALLY works. Good for precision as well as hard use. It's not cheap, but it's not cheap for a reason and I learned that real fast. Of all my suppressors, that one is the most complex and different than the rest, but uses no gimmicks, it's a traditional can with baffles. A LOT of baffles. Saker is just a good, solid QD can, also with good mounts, their flash suppressor doesn't "ping" like AAC's and it twists on and off too. Fairly hefty but it can take a lot of abuse and is good for many roles. Made of Stellite, the material that lines .50BMG barrels, tougher than Inconel.
AAC makes a good can with a shitty mount, but if you can find a good deal on one (I have two ea., SDN6 and 556SD) and are willing to buy ten mounts for each can and picking the good ones while sending the bad ones back, you can get a really good can with a solid mount. And you won't have to "fix" the mount by resurfacing the bevel. The can itself is actually very well made and uses Inconel in construction.
There are many other good ones like Surefire too. But what I'd try and do is get the Ultra 9 .30 (or 6.5 if it's only going on a 6.5) and then get a hard use can. What you plan on using it for would dictate cost I guess. If it's just going on that one SBR, I'd want a short one, either a Saker 556 or 556k, AAC 556SD, Elite Iron compact, etc. All of which can be had for good prices, especially if you get it on sale. AAC and Sico just had a big one, AAC has bee cutting big discounts lately and would be a great source for a can dedicated to one SBR.
Also, depending on your definition of "hard use" you may be able to get away with just the one TBAC and be able to do what you want, or at least until you can get others. Tell them what you plan to do. FWIW, I use TBAC on SBR's, two of 'em: an Ultra 5 (or 30CB9) on an 8.2" .300BLK with supers and subs; a 6.5 Ultra 9 and the same Ultra 5 on an 11.5" 6.5G. Was told they could handle around 5 mags as fast as I can pull the trigger before needing to cool all the way down. I never do that, so it's not a problem at all.
Good luck either way you go!
