I think the Octane 45 is the most versatile can available for your intended purpose. It accepts all Osprey pistons as well as the 3-Lug adapter that is used on the Octane 9. It's user-serviceable with heat-treated stainless baffles. Since you're gonna be married to the suppressor, might as well get something that you can maintain over the years.
I don't own one, but I have the Octane 9 HD2 and I don't regret it one bit. I use it on my MP5, my Glock 19, SIG 239 and Browning Buckmark. That's a lot of flexibility for one can.