To answer your first question, I don't know of any suppressor that is comming out that I would wait for. I had a AAC Cyclone that I have had for several years. I bought it for a subsonic 308 with a 1 in 7 twist barrel. It is heavy ! I bought a Suppressed Armament Systems Ti Arbiter last year. As shown in the pic, I chose the thread on over brake design. It is a great can, it is half the weight of my AAC and for me has had much less POI shift than the AAC. The Arbiter is the most competitivley priced Ti suppressors I could find. I am glad I did, the quality is great. I use it on my 5.56 m4, SBR, 300Blk boltgun (used to be the subsonic 308 and I rechambered it), and 308.
Here is my 7.5 inch blackout with The SAS Arbiter. The suppressor is 9 inches for comparison